Mie^oseoPES. 
BAUSCH&LOMB OPTICAL CO. 
/leeEssoRies. ILLUSTRATED CATALOGUE 
OF 
Microscopes, Objectives 
. . and . . 
Accessories, 
MANUFACTURED BY 
Ll@mb Qpfeiaal Q®. 
FACTORY AND OFFICE: 
515-543 N. ST. PAUL STREET, 
ROCHESTER, N. Y. 
P. O. DRAWER 1033. 
BRANCH OFFICE: 
48 AND 50 MAIDEN LANE, 
NEW YORK CITY. 
p. O. BOX 432. 
THIRTEENTH EDITION. PRESS OF A. J. WEGMAN, ROCHESTER, N. Y TERMS. 
Goods should be ordered under their respective letters and numbers. 
Our terms are cash at catalogue prices. 
Parties unknown to us, when ordering, should give satisfactory reference ; 
•otherwise remittance should accompany the order. Remit by Post-office or 
Express Order, or New York Draft, made payable to us. Expense of collecting, 
if any, must be defrayed by the purchaser. Money in letters is at the risk of 
sender. 
Goods will be sent by Express C. O. D., expense of collection to be borne 
by purchaser. One-fourth of total amount should accompany order. 
We make no charye for packing. 
We assume responsibility for all goods shipped by Express 
tiring transportation and rectify any damages which may 
ecu r. 
Freight should never be used fomany of our goods. Ship- 
ments so ordered are at the risk of the purchaser. 
Goods sent by mail are likewise at purchaser’s risk. 
Correspondents are requested to give exact Post-office address, and state 
distinctly by what Express line goods are to be shipped. 
When goods are returned for exchange, repair or otherwise, a tag bearing 
sender’s name and address should be attached ; this is very essential and will 
avoid delays. 
Our book, “ Manipulation of the Microscope ” (second edition, bound in 
•cloth, price 75 cents), is furnished free to every purchaser of one of our 
instruments. In case it is desired to study the subject before making a selection, 
the book should be paid for, but we give credit for the amount when an instru- 
ment is purchased at its full price. It gives all necessary information on the 
principles and leads to the intelligent use of the microscope in plain and concise 
language. It is spoken of in high terms by those most conversant with the 
rsubject of microscopy. PREFACE. 
After years of indefatigable and unceasing efforts to reduce the cost of pro- 
duction of microscopes, so as to bring them within the means of the practitioner 
and student, to offer such patterns as will meet the variety of tastes and 
requirements, to raise the standard of excellence of the optical and mechanical 
perfection, we have reached the gratifying state, which may be aptly called the 
first era of this portion of our business. With the issue of this edition of our 
catalogue we have 
MADE AND SOLD 10,000 MICROSCOPES, 
not including the thousands of dissecting microscopes. 
There are few colleges or other educational institutions with well equipped 
microscopical laboratories whicfr have not our instruments in constant use. 
They are used by our Government in its various departments. The most 
eminent individual microscopists and practitioners throughout this country use 
and recommend our products. 
This result is not alone due to the worth of our products, but in a large 
measure to the kindly and patriotic desire of our scientists to use American 
microscopes, and to see their production successfully carried on within our 
borders. That they possess unusual merit is evinced by the fact that a demand 
has arisen for them in European countries. 
This issue is entirely revised and provided almost throughout with new 
illustrations, showing new apparatus, as well as giving exact representations of 
instruments which have undergone changes to meet modern requirements and 
improvements in structure. 
BAUSCH & LOME OPTICAL CO. 
June 1892. IMPORTANT FACTS. 
Buy American Microscopes,—The development of our instruments 
is the result of suggestions from the most eminent American scientists, and they 
are therefore particularly well adapted to American wants. The practical 
advantages are that they may be obtained in short time, and with the absolute 
assurance that they are the best of their kind, and that any repairs which may 
be required are quickly and cheaply done, and bring an instrument up to its 
original excellence. 
We guarantee all our products.—In doing this we are fully 
cognizant of the responsibility and adequately in position to accomplish it. 
Whenever it is possible, we apply special machinery, which we devise and build, 
and there is probably no optical establishment in the world which possesses such 
a quantity of precise and delicate tools. As adjunct to these we have in our 
employ a class of mechanics of superior accomplishments. All work is under 
our personal supervision, and none is sent out until after a painstaking personal 
scrutiny. 
We offer a larger variety of instruments titan any manu- 
facturer in the world.—This variety does not exist for the sake of 
variety, but is retained to meet the difference of tastes and requirements. Each 
instrument offers advantages either in price, size or utility. 
All apparatus enumerated is produced entirely at our 
factory and under our constant personal supervision.—It is 
almost impossible for faulty work to pass unnoticed. In a business so extensive 
as ours, however, this may occasionally occur, but when so, we are thankful to 
have our attention drawn to the same and cheerfully remedy any defects. 
We keep a stock of all apparatus on hand.—While this is often 
difficult on account of the constantly increasing demand for our products, we 
bend all our efforts to keep pace, and ordinarily are in condition to supply any 
demand promptly. In this connection we may state that we supplied the United 
States Government with 300 microscopes for the inspection of pork, which 
were delivered within two months from date of order. 
We guarantee the safe arrival of our instruments when 
shipped by Express.—A purchaser may therefore rely upon receiving an 
instrument in perfect condition. If any accident should occur, we remedy the 
defect. JVe make exchanges in oav prod acts,—This is important, as pur- 
chasers often find that certain apparatus is unsuitable for the work intended. 
We make the condition, however, that articles to be exchanged correspond with 
our current catalogue, and that we be remunerated for putting articles in salable 
condition. 
Our draw-tubes are all graduated with the exception of a few 
inexpensive forms. Besides this, they are all arranged to be used for the short 
and long standards, which have been established by the American Society of 
Microscopists. 
It is with pleasure that we announce to the scientific world that by an 
agreement with the well-known firm of 
CARL ZEISS OF JENA, 
we are made the sole manufacturers under license of the American patents 
of their photographic lenses, which we have this year introduced into the 
American market. Without desiring to enlarge on this subject, it is gratifying 
to us, as no doubt it is to our patrons, to show the good feeling existing between 
the two firms, and the esteem in which they hold one another. 
Our photographic catalogue, containing a list of different series of Zeiss- 
Anastigmat, Rapid Universal and Alvan G. Clark Lenses, as well as Diaphragm 
Shutter, will be sent to any address. 
BAUSCH & LOMB OPTICAL CO. Genfeinenfeal Mi©F©s©@pes. 
Following out the principle of giving the public whatever there may be a 
demand for, we are now making a Series of these microscopes which correspond 
with the principal types of the instruments supplied by the best European 
Continental makers. 
We have endeavored to combine the best features of the various patterns in 
our instruments, and have made some modifications at the suggestion of eminent 
gentlemen who favor this type, such as larger stages and broader bases, so that 
for solidity and comfort of working, we believe that ours possess advantages. 
The working parts are made to work with the greatest smoothness, and the 
finish as well as perfection of the optical adjuncts, are of the highest order. 
The demand for these instruments has been especially from educational 
institutions, and it is our object to supply them for this purpose at prices which 
meet those of European productions, when imported duty free. 8 
BAUSCH & LOMB OPTICAL COMPANY, 
(Cut one-half of actual size.) 
/V— CONTINENTAL MICROSCOPE. 
SMALL. ROCHESTER, N. Y., AND NEW YORK CITY. 
9 
MICROSCOPE. 
(SMALL.) 
The base of this stand has the horseshoe form, and is of japanned iron. 
Pillar is of brass ; the stage is square and has spring clips which are readily 
removable ; a revolving diaphragm is attached to the under side of the stage 
having four different size apertures. The mirror-bar is secured to the arm and 
can be swung to any obliquity below the stage ; the mirrors are plane and 
concave. Coarse adjustment is by sliding tube, and fine adjustment by micrometer 
screw acting on triangular bearing of the arm. Main tube is provided with draw- 
tube, which will allow extension of tubes to the ioi .andard. 
The instrument is made in two forms : 
A, with solid pillar and arm ; 
AA, with joint for inclination. 
Eyepieces are the Continental, objectives of Series 
Upright polished case with receptacles for eyepieces and objectives accom- 
panies the outfit. 
A. Stand with 1 eyepiece (any power), - - - - - $18.00 
Al. Stand with 1 eyepiece and f in. objective, ..... 25.00 
A2. Stand with 1 eyepiece and § in. and in. objectives, ... 40.00 
4.3. Stand with 2 eyepieces and f in. and in. objectives, .... 48.00 
A4. Stand with 2 eyepieces and 2 in., f in. and | in. objectives, - - 49.00 
AA. Stand with 1 eyepiece (any power), ...... 20.00 
AA1. Stand with 1 eyepiece and f in. objective, ..... 27.00 
AA2. Stand with 1 eyepiece and § in. and | in. objectives, - - - - 42.00 
AA3. Stand with 1 eyepiece and 2 in., § in. and in. objectives, - - 48.00 
AA4. Stand with 2 eyepieces and | in. and l in. objectives, .... 45.00 
AA5. Stand with 2 eyepieces and 2 in., f in. and } in. objectives, - - 51.00 
Double nosepiece, brass finish extra, ------ 5.00 
For table of magnifying powers, refer to page 47. 10 
BAUSCH & LOMB OPTICAL COMPANY, 
(Cut one-half of actual size.) 
BB— CONTINENTAL MICROSCOPE. 
MEDIUM. ROCHESTER, N. Y., AND NEW YORK CITY. 
11 
IB-continental microscope. 
(medium.) 
This microscope is made of brass throughout, highly polished and lacquered. 
The base is of larger dimensions than any of the foreign instruments, and 
therefore more firm, particularly when the body is inclined. The stage is 
also of large size, thus allowing the use of culture slides without the danger 
of tilting ; a groove is provided on its lower surface for the slide with cylinder 
diaphragms, for convenience called slide A. This slide may be replaced by 
another (slide B), carrying standard size sub-stage, arranged to be centered, 
provided with our dome diaphragm. To this may also be fitted any of our 
regular sub-stage accessories, particularly the series of sub-stage condensers. 
Fine adjustment is by large micrometer screw and works on the triangular 
bearing of the arm. The main tube has a draw-tube, which, when contracted, 
gives short standard of tube length with double nosepiece. The draw-tube 
may be extended and is graduated in millimeters. 
The instrument is made in two forms : 
B, with joint for inclination and sliding tube for coarse adjustment. 
BB, with joint for inclination, and rack and pinion for coarse adjustment 
Eyepieces are the Continental, objectives of Series I. 
Upright polished case, with receptacles for eyepieces and objectives, 
accompanies the outfit. 
B. Stand with 1 eyepiece (any power), ...... $25.00 
Bl. Stand with 1 eyepiece and f in. and in. objectives, .... 47.00 
B2. Stand with 1 eyepiece and 2 in., f in. and | in. objectives, - - 53.00 
B3. Stand with 2 eyepieces and f in. and £ in. objectives, .... 50.00 
B4. Stand with 2 eyepieces and 2 in., f in. and in. objectives, - - 56.00 
B5. Stand with 2 eyepieces and f in., £ in. and fa in. oil immersion, objectives, 95.00 
B6. Stand with 2 eyepieces and 2 in., f in., in. and fa in. oil immersion, objectives, 101.00 
BB. Stand with 1 eyepiece (any power), ...... 35.00 
BB1. Stand with 1 eyepiece and f in. and in. objectives, ... 57.00 
BB2. Stand with 1 eyepiece and 2 in., f in. and in. objectives, ... 63.00 
BB3. Stand with. 2 eyepieces and f in. and | in. objectives, ... 60.00 
BBT. Stand with 2 eyepieces and 2 in., f in. and in. objectives, ... 66.00 
BBS. Stand with 2 eyepieces and f in., | in. and fa in. oil immersion, objectives, 105.00 
BB6. Stand with 2 eyepieces and 2 in., f in., £ in. and fa in. oil immersion, objectives, 111.00 
Slide B, carrying standard sub-stage ring, with dome diaphragm, extra, - 4.00 
Abbe condenser, 1.20 N. A., in mounting, No. 1678, .... 14.00 
Abbe condenser, 1.42 N. A., in mounting, No. 1678, ... 16.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra. ------ 9.00 
For table of magnifying powers refer to page 47. 12 
BAUSCH & LOMB OPTICAL COMPANY, 
(Cut one-half of actual size.) 
CC-CONTINENTAL MICROSCOPE. 
LARGE. ROCHESTER, N. Y., AND NEW YORK CITY 
13 
O—CONTINENTAL MICROSCOPE. 
(large. ) 
This instrument is made entirely of brass; the base is of large dimensions 
and heavy, to secure extreme steadiness under manipulation in an inclined, 
upright or horizontal position ; coarse adjustment is by rack and pinion ; fine 
adjustment by large micrometer screw working on the triangular bearing of the 
arm ; the head of the micrometer screw is graduated to H>0 parts, an index 
point is provided. The main tube has a draw-tube which is graduated. When 
contracted, the tubes give short standard tube length with double nosepiece. 
This instrument is made up in five forms : 
C. Plain square stage with groove, fitted with slide and cylinder diaphragms. 
Swinging mirror-bar with adjustable plane and concave mirrors. 
CA. Plain square stage as in C ; sub-stage attachment, complete, No. 1684. 
CB. Revolving stage with centering arrangement ; swinging mirror-bar with 
adjustable plane and concave mirrors. 
CC. (As in cut.) Revolving stage with centering arrangement ; sub-stage 
attachment, complete, No. 1684. 
CD. Mechanical stage, revolving, with graduations and vernier; rectangular 
movements with graduations ; centering arrangement ; sub-stage attach- 
ment, complete, No. 1684. 
Eyepieces are the Continental, objectives of Series I. Upright polished case, 
with receptacles for eyepieces and objectives, accompanies the outfit. 
C. Stand with 1 eyepiece (any power), ...... $55.00 
Cl. Stand with 1 eyepiece and f in. and in. objectives, .... 77.00 
C2. Stand with 2 eyepieces and § in. and in. objectives, ... 80.00 
CA. Stand with 1 eyepiece (any power), ...... 80.00 
CA1 Stand with 1 eyepiece and f in. and jt in. objectives, ... 102.00 
CA2. Stand with 2 eyepieces and § in and in. objectives, .... 105.00 
CAS. Stand with 2 eyepieces and 2 in., f in. and in. objectives, - - 111.00 
CA4. Stand with 2 eyepieces and f in., | in. and y in. oil immersion, objectives, - 150.00 
CAo. Stand with 2 eyepieces and 2 in., f in., I in. and in. oil immersion, 
objectives, ......... 156.00 
CB Stand with 1 eyepiece (any power), ...... 65.00 
CB1. Stand with 1 eyepiece and f in and | in. objectives, ... 87.00 
CB2. Stand with 2 eyepieces and § in. and in. objectives, .... 90.00 
CBS. Stand with 2 eyepieces and 2 in., f in. and | in objectives, - - 96.00 
CB 1. Stand with 2 eyepieces and f in., in and y'a in. oil immersion, objectives, - 185.00 
CB5. Stand with 2 eyepieces and 2 in , f in., J in. and T in. oil immersion, 
objectives, ......... 141 00 
CC. Stand with 1 eyepiece (any power), ...... 90.00 
CC1. Stand with 1 eyepiece and § in. and £ in objectives, ... 112.00 
CC2. Stand with 2 eyepieces and f in. and £ in. objectives, .... 115.00 
CCS. Stand with 2 eyepieces and 2 in., f in. and in. objectives, - - 121.00 
CC4. Stand with 2 eyepieces and f in., } in. and y in. oil immersion, objectives, - 160.00 
CCo. Stand with 2 eyepieces and 2 in., f in., in. and y in. oil immersion, 
objectives, --------- 166.00 
Cl). Stand with 1 eyepiece (any power), ...... 180.00 
cm. Stand with 1 eyepiece and f in. and in. objectives, ... 152.00 
Cl>2. Stand with 2 eyepieces and § in. and in. objectives, .... 155.00 
CDS. Stand with 2 eyepieces and 2 in., f in. and l in. objectives, - - 161.00 
CD4. Stand with 2 eyepieces and f in., \ in. and y in. oil immersion, objectives, - 200.00 
CDo. Stand with 2 eyepieces and 2 in., f in., in. and y in. oil immersion, 
objectives, --------- 206.00 
For table of magnifying powers refer to page 47. MmeFiGapi Wjpe. 
This class of microscopes is almost generally preferred for individual use, 
and will always remain favorites because they possess features which are specifi- 
cally the outcome of American ingenuity. The designs and finish are made 
pleasing to the eye as well as being effective for the purpose. Many of the parts 
are for convenience of manipulation, while others are for obtaining the best 
results with the least expenditure of time, and also for lasting qualities. Many 
of the important features have originated with us and are only produced by 
our firm. 16 
BAUSCH & LOMB OPTICAL COMPANY, 
D — LIBRARY MICROSCOPE. 
(Cut one-half of actual size.) ROCHESTER, N. Y., AND NEW YORK CITY. 
17 
13-library microscope. 
This microscope is intended mainly for young beginners. It is well made and 
thoroughly reliable. 
It has japanned foot and arm with joint for inclination. The adjustment 
is by rack and pinion of such delicacy that it is readily serviceable with a 
high power objective. The body is provided with draw-tube and society screw. 
The eyepieces are of the Continental pattern ; the mirror is concave, swinging 
so as to give oblique illumination, and capable of being brought above the stage 
for illumination of opaque objects. The stage is provided with spring clips. 
We make two forms of this instrument: 
I). As described above. 
DD. The same, but with the addition of an adjustable stage plate, provided 
with micrometer screw, which, while limited in its motion, forms a 
serviceable fine adjustment. 
Objectives are Series II, unless otherwise stated. 
In upright case with handle. 
D. Stand with 1 eyepiece (any power), ■ - - - - - $10.00 
Dl. Stand with 1 eyepiece and 1 in. objective, - 16.00 
D2. Stand with 1 eyepiece and 1 in. and in. objectives, ... 30.00 
1)3. Stand with 1 eyepiece and non-achromatic doublet objective ; no society screw, 10.00 
IM. Stand with 1 eyepiece and achromatic doublet objective ; no society screw, 12.00 
DI). Stand with 1 eyepiece (any power), - - - - - 13.00 
DI)1. Stand with 1 eyepiece and 1 in. objective, ----- 19.00 
DD2. Stand with 1 eyepiece and 1 in. and \ in. objectives, - 33.00 
For table of magnifying powers, refer to page 47. 18 
BAUSCH & LOME OPTICAL COMPANY, 
(Cut one-half of actual size.) 
EE —HARVARD microscope. ROCHESTER, N. Y., AND NEW YORK CITY. 
19 
IE-HARVARD MICROSCOPE. 
The stand is made entirely of brass, with bronze pillar and arm. Although 
compact so as to allow its convenient use in an upright position on an ordinary 
table, it still gives sufficient range of adjustment for all ordinary work. The 
base is of the horseshoe form, with a projection at the back to give it steadiness 
when the body is inclined. Coarse adjustment is by a sliding tube in a cloth- 
lined sleeve, which gives an exceedingly smooth and firm movement; fine 
adjustment is by micrometer screw, with milled head of more than ordinary 
size, acting on our patent movement. The main tube also has a cloth lining 
and is provided with a draw-tube graduated in millimeters, and with a mark 
indicating standard length. The stage is large and provided with spring clips ; 
our dome diaphragm is attached to its lower surface by a sub-stage. The 
mirrors are plane and concave, of large size, and swing with the mirror-bar 
to any obliquity below the stage, and above it for the illumination of opaque 
objects ; they also have adjustment on the mirror-bar. 
E. Is arranged with joint for inclination of the body. 
EE. Is provided with rack and pinion for coarse adjustment, as well as with 
joint for inclination of the body. 
Eyepieces are the Huyghenian, objectives of Series II, unless otherwise 
stated. 
Polished case, with receptacle for eyepieces and objectives, with handle 
and lock, accompanies the outfit. 
With every complete outfit (stand and objectives) we supply eyepiece 
micrometer No. 1734 free, this cannot be used on powers less than 
C or 1 in. 
E. Stand with 1 eyepiece, (any power), ------ $27.00 
El. Stand with 1 eyepiece and f in. and in. objectives, - - - 50.00 
E2. Stand with 1 eyepiece and 2 in., f in. and 4 in. objectives, - 56.00 
E3. Stand with 2 eyepieces and f in. and 4 in. objectives, - 54.00 
E4. Stand with 2 eyepieces and 2 in., f in. and in. objectives, - 60.00 
Eo. Stand with 2 eyepieces and f in., 4 in. and in. oil immersion, (Series III.) 
objectives, --------- - 99.00 
EE. Stand with 1 eyepiece, (any power), ------ 35.00 
EE1. Stand with 1 eyepiece and £ in and 4 in. objectives, - 58.00 
EE2. Stand with 1 eyepiece and 2 in.. £ in. and in. objectives, - 64.00 
EE3. Stand with 2 eyepieces and £ in and 4 in. objectives, - 62.00 
EE4 Stand with 2 eyepieces and 2 in., £ in. and in. objectives, - - 68.00 
EE5. Stand with 2 eyepieces and £ in., jt in. and A in. oil immersion, (Series III) 
objectives, - -- -- -- -- 107.00 
EE6. Stand with 2 eyepieces and 2 in., £ in., 4 in. and y in. oil immersion, (Series 
III) objectives, - -- -- -- - 113.00 
Abbe condenser, 1.20 N. A., in mounting, No. 1678, extra, - 14.00 
Abbe condenser, 1 42 N. A., in mounting, No. 1678, extra, ... 16.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Tripip nosepiece, brass finish, extra, ------ 9.00 
For table of magnifying powers, refer to page 47. 20 
BAUSCH & LOMB OPTICAL COMPANY. 
• Cut one-lialf of actual size). 
F — MODEL MICROSCOPE. ROCHESTER, N. Y., AND NEW YORK CITY. 
21 
IETMviodel microscope. 
The tripod base, pillars and arm, are neatly japanned ; the axis is arranged 
with strong bearings to allow inclination of the body to any angle. Coarse 
adjustment is by perfect rack and pinion, provided with tightening screws ; 
fine adjustment by a delicate micrometer screw, acting on our patent movement. 
The stage is of brass, circular in form, thin to allow great obliquity, but 
of sufficient strength to be firm under manipulation. Attached to its lower 
side is a sub-stage ring and dome diaphragm, both of which may be removed. 
The main tube is arranged with cloth lining in which the graduated draw- 
tube is fitted ; it is provided with the society screw. Plane and concave mirrors 
are of large size, adjustable on the mirror-bar; the mirror-bar swings on a 
bearing (the axis of which lies in the plane of the stage) to any obliquity 
below and above the stage, the latter for the illumination of opaque objects. 
Eyepieces are the Huyghenian, objectives of Series II, unless otherwise 
stated. 
Upright polished case with drawer for accessories and receptacles for eye- 
pieces and objectives, with handle and lock, accompanies the outfit. 
With every complete outfit (stand and objectives) we supply eyepiece micro- 
meter No. 1734 free, this cannot be used on powers less than C or 1 in. 
F. Stand with 1 eyepiece (any power), ------ $25.00 
FI. Stand with 1 eyepiece and f in. and in. objectives, .... 48.00 
F2. Stand with 1 eyepiece and 2 in., £ in. and £ in. objectives, ... 54.00 
F3. Stand with 2 eyepieces and £ in and £ in. objectives, - 52.00 
F4. Stand with 2 eyepieces and 2 in., £ in. and £ in. objectives, ... 58.00 
F5. Stand with 2 eyepieces and £ in. 4 in., and in. oil immersion, (Series III) 
objectives, ......... 97.00 
F6. Stand with 2 eyepieces and 2 in., £ in., in and in. oil immersion, (Series 
III) objectives, ........ 103.00 
Revolving stage, with removable spring clips, extra, - - ... 5.00 
Glass stage with slide carrier, which slips over either plain or revolving stages, extra, 5.00 
Graduated mirror bar, with mirror and sub-stage (both adjustable), same as used on 
Investigator, in place of one accompanying stand, extra, - - - 5.00 
Abbe condenser, 1.20 N. A., in mounting, No. 1678, extra, - - - 14.00 
Abbe condenser, 1.42 N. A., in mounting, No. 1678, extra, ... 16.00 
Mechanical stage No. 1728 , in place of the regular, extra, ... 18.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra, ...... 9.00 
For table of magnifying powers, refer to page 47. 22 
BAUSCH & LOMB OPTICAL COMPANY. 
Q —PHYSICIAN MICROSCOPE. 
(Cut one-half of actualize.) ROCHESTER, N. V., AND NEW YORK CITY. 
23 
Gr-PHYSICIAN MICROSCOPE. 
The base is japanned iron. Pillar and arm are of bronze, connected by a 
joint for inclination of the body. Coarse adjustment is by rack and pinion, 
giving a long range; fine adjustment by micrometer screw, acting on our 
patent movement; main tube has cloth lining and is provided with graduated 
draw-tube. The stage consists of our square glass stage and slide-carrier 
attached to a firm projecting stage plate. The mirror-bar is provided with 
adjustable sub-stage, carrying dome diaphraghm, and plane and concave mirrors. 
It swings on its axis in plane of the stage to any obliquity below or above the 
stage. 
Eyepieces are the Huyghenian, objectives of Series II, unless otherwise 
stated. 
Upright polished case with drawer for accessories and receptacles for 
eyepieces and objectives, with handle and lock, accompanies the outfit. 
With every complete outfit (stand and objectives), we supply eyepiece 
micrometer No. 1734 free, this cannot be used on powers less than 
C or 1 in. 
(x. Stand with 1 eyepiece (any power). ------ $40.00 
(xl. Stand with 1 eyepiece and f in. and £ in. objectives, .... 63.00 
(x2. Stand with 1 eyepiece and 2 in., f in. and in. objectives, ... 69.00 
(x8. Stand with 2 eyepieces and f in. and in. objectives, .... 67.00 
Gf4 Stand with 2 eyepieces and 2 in., f in. and in. objectives, ... 73.00 
(xo. Stand with 2 eyepieces and f in., in. and in. oil immersion, (Series III) 
objectives, --------- 112.00 
06. Stand with 2 eyepieces and 2 in., f in., 4 in. and in. oil immersion, (Series 
III) objectives, ... . . . - - - 118.00 
Investigator base in place of japanned iron base, with suitable case, extra, - 2.50 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra, ------ 9.00 
Abbe condenser, 1.20 N. A., in mounting, No. 1678, extra, - - - 14.00 
Abbe condenser, 1.42 N. A., in mounting, No. 1678, extra, ... 16.00 
For table of magnifying powers refer to page 47. 24 
RAUSCH & LOMB OPTICAL COMPANY, 
(Cut one-half of actual size.) 
H — INVESTIGATOR MICROSCOPE. ROCHESTER, N. Y., AND NEW YORK CITY. 
25 
IEEunvestigator microscope. 
The base is of brass and has the tripod form ; pillar and arm of bronze, 
connected by a solid joint for inclination of body ; rack and pinion for coarse 
adjustment, fine adjustment by our patent frictionless motion ; main tube 
with two draw-tubes, one of which is graduated in millimeters, arranged with 
cloth lining. The stage lies in the same plane as center of movement for 
mirror, is of bronze and has concentric, revolving motion with removable clips. 
The mirror-bar swings upon its bearing to any obliquity below and above 
the stage. It is provided with a sliding arrangement, whereby the mirror 
may be moved to and from the object. The mirrors are plane and concave 
and adjustable. The sub-stage is adjustable and provided with dome diaphragm. 
Steel pin for centering stage and sub-stage is provided. 
Eyepieces are the Hughenian, objectives of Series II, unless otherwise 
stated. 
Upright polished case with drawer for accessories and receptacles for eye- 
pieces and objectives, with handle and lock, accompanies the outfit. 
With every complete outfit (stand and objectives), we supply eyepiece micro- 
meter No. 1734 free, this cannot be used on powers less than C or 1 in. 
H. Stand with 1 eyepiece (any power), - - - - - . - $45.00 
HI. Stand with 1 eyepiece and f in. and | in. objectives, - 68.00 
H2. Stand with 1 eyepiece and 2 in., f in. and in. objectives, ... 74.00 
H3. Stand with 2 eyepieces, and f in. and l in. objectives, - 72.00 
H4. Stand with 2 eyepieces, and 2 in., £ in. and £ in. objectives, - - - 78.00 
H5. Stand with 2 eyepieces, and £ in., \ in. and in. oil immersion, (Series III) 
objectives, --------- 117.00 
H6. Stand with 2 eyepieces, and 2 in., £ in., £ in. and oil immersion, (Series III) 
objectives, --------- 123.00 
Glass stage and slide-carrier which slips over brass stage, extra, - - - 5.00 
Mechanical stage No. 1728, in place of the regular, extra, ... 17.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra, ------ 9.00 
Abbe condenser, 1.20 N. A., in mounting No. 1678, extra, - - - 14.00 
Abbe condenser, 1.42 N. A., in mounting No. 1678, extra, ... 16.00 
For table of magnifying powers refer to page 47. 26 
BAUSCH & LOME OPTICAL COMPANY, 
(Cut one-half of actual size.) 
J — UNIVERSAL MICROSCOPE. ROCHESTER, N. Y., AND NEW YORK CITY. 
27 
J"—UNIVERSAL MICROSCOPE. 
The base is of the tripod form and made of brass. The bronze pillar 
is large, and connected by joint for inclination of the arm. A heavy thumb- 
screw permits the instrument to be fastened in any position on the base. 
The coarse adjustment is by rack and pinion of long range ; the fine adjustment 
is by micrometer screw acting on our patent frictionless motion. The main 
tube has two draw-tubes, one being graduated, provided with cloth-lining. 
The stage has concentric, revolving motion with removable spring clips. The 
mirrors are plane and concave and of large size, and both these and the 
sub-stage, carrying dome diaphragm, are adjustable on their respective bars ; 
the circular bearings of these are large and are graduated to degrees and 
silvered. The mirror and sub-stage bars have their axis in the plane of the 
stage and move independent of one another or together to any obliquity below 
or above the stage. A steel pin for centering stage and sub-stage accompanies 
the instrument. 
Eyepieces are the Huyghenian, objectives of Series II, unless otherwise 
stated. 
> 
Upright polished case with drawer for accessories and receptacles for 
eyepieces and objectives, with handle and lock, accompanies the outfit. 
With every complete outfit (stand and objectives) we supply eyepiece 
micrometer No. 1734 free, this cannot be used on powers less than C 
or 1 in. 
J. Stand with 1 eyepiece (any power), ------ $55.00 
Jl. Stand with 1 eyepiece and f in. and in. objectives, - 78.00 
J2. Stand with 1 eyepiece and 2 in., f in. and i in. objectives, ... 84.00 
J3. Stand with 2 eyepieces and f in. and £ in. objectives, - - - 82.00 
J4. Stand with 2 eyepieces and 2 in., § in. and f in. objectives, - 88.00 
J5. Stand with 2 eyepieces and f in., in. and in. oil immersion (Series III) 
objectives, - - -- -- -- - 127.00 
J6. Stand with 2 eyepieces and 2 in., f in., in. and in. oil immersion 
(Series III) objectives, ------- 183.00 
Glass stage and slide-carrier which slips over brass stage, extra, - - 5.00 
Mechanical stage No. 1728, in place of the regular, - 17.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra, ------ 9.00 
Abbe condenser, 1.20 N. A. in mounting No. 1678, extra, - 14.00 
Abbe condenser, 1.42 N. A. in mounting No. 1678, extra, - 16.00 
Rack and pinion adjustment to the sub-stage, extra, - 15.00 
Centering adjustments by micrometer screw to either stage or sub-stage, extra, 
for each, --------- 15.00 
For table of magnifying powers, refer to page 47. (Cut one-halt of actual size.) 
K — PROFESSIONAL microscope. ROCHESTER, N. Y., AND NEW YORK CITY. 
29 
IKI-PROFESSIONAL MICROSCOPE. 
This instrument may be considered as the highest attainment in micro- 
scopical construction, in design, solidity and practical utility of the various 
parts. It is entirely constructed of brass and bronze. The base is unusually 
large and heavy. To its upper surface is fastened a revolvable plate graduated 
and provided with index, to which is attached two pillars. The arm is fitted 
to pillars by joint for inclination with steel axis. Coarse adjustment is by 
rack and pinion with large milled heads. The micrometer screw acting on 
fine adjustment is graduated to hundred parts and provided with index finger. 
Main tube has draw-tube working in cloth lining. Tubes when contracted 
are of the long standard. Mirror and sub-stage bars are separate and have 
independent movements working on an axis in the plane of the stage ; both 
are graduated to degrees. Mirrors are plane and concave, of unusual large 
size and adjustable on mirror-bar. The sub-stage consists of the entire 
attachment No. 1684, and has a long adjustment by rack and pinion. The 
stage is revolving, graduated to degrees and provided with vernier. It has 
spring clips and centering adjustment. Graduations are all silvered. 
Eyepieces are the Huyghenian, objectives of Series II, unless otherwise 
stated. 
Upright polished case, with handle, lock and key, drawer for accessories 
and receptacles for eyepieces and objectives, accompanies the outfit. 
With every complete outfit (stand and objectives) we supply eyepiece micro- 
meter No. 1731 free, this cannot be used on powers less than C or 1 in. 
K. Stand with 2 eyepieces, ------- - $135.00 
Kl. Stand with 2 eyepieces and f in. and 4 in. objectives, - 158.00 
K2. Stand with 2 eyepieces and 2 in., £ in. and in. objectives, - - 164.00 
K3. Stand with 2 eyepieces and 2 in., £ in.. in. and ]/% in. objectives, - - 182.00 
K4-. Stand with 3 eyepieces and f in and £ in objectives, - 162.00 
K5. Stand with 3 eyepieces and 2 in., £ in. and £ in. objectives, - 168.00 
K6. Stand with 3 eyepieces and 2 in., £ in., 4 in. and l/% in. objectives, - 186.00 
K7. Stand with 2 eyepieces and f in., in. and fa in. oil immersion, (Series III) 
objectives, - -- -- -- -- 203.00 
K8. Stand with 3 eyepieces and £ in., 4 in. and TV in. oil immersion, (Series III) 
objectives, - - - - - - - • - - 207.00 
K9. Stand with 4 eyepieces and 2 in., f in., \ in. and in. oil immersion, (Series III) 
objectives, - 217.00 
Double nosepiece, brass finish, extra, ------ 5.00 
Triple nosepiece, brass finish, extra, ------ 9.00 
Abbe condenser, 1.20 N A. in mounting, No. 1678, extra, - 14.00 
Abbe condenser, 1.42 N. A. in mounting, No. 1678,’ extra, - * 16.00 
Mechanical Stage No. 1732, in place of one accompanying stand, extra, - 30.00 
For table of magnifying powers refer to page 47. MiQF©s©@pes 
£©p 
Special EWpsses. 
(Cut one-half of actual size.) 
LL — PETROGRAPHICAL MICROSCOPE. ROCHESTER, N. Y., AND NEW YORK CITY. 
31 
Hi—PETROGRAPHIC AL MICROSCOPE. 
The base, upright pillars and arm of this instrument are of japanned iron ; 
the stage will be made in two ways, first, plain revolving, having silvered 
graduations at right angles and second, our mechanical stage, No. 1728, with 
silvered graduations on the edge, with vernier and graduations for the rect- 
angular movements ; mirror-bar is adjustable and graduated, mirror of large 
size, plane and concave ; coarse adjustment is by rack and pinion, fine adjust- 
ment by micrometer screw, with graduated head into hundred parts ; pitch of 
screw, 72. The nosepiece has centering adjustment and opening for the use 
of the various accessories, also ring to exclude light when not in use. The 
double chambered box in the main tube carries in the one opening the upper 
nicol or analyzer, the second being vacant and which may be slid in or out 
at will, without at any time leaving an opening through which dust may enter. 
The eyepiece tube is moved in the main tube by rack and pinion and has 
two openings to receive accessories ; the lower nicol in polarizer is mounted 
in cylindrical box beneath the stage, to which it is held by a swinging arm, 
so that it may be thrown instantly to one side if desired. The polarizer 
may be vertically raised or depressed by a rack and pinion movement, and 
is capable of an axial revolution upon a graduated and silvered circle with 
index. It is provided with a compound lens for securing converged polarized 
light, which may be removed at will ; the point at which both nicols are crossed, 
giving total extinction of light, is registered by a pronounced click, provided in 
the polarizer mounting. Eyepieces have projecting studs which fit into slits in 
eyepiece tube securing central position and allowing movement to 45 degrees 
either way. The following accessories are a part of the stand : a) Bertrand’s 
lens for magnifying the interference figure ; b) a quarter undulation mica 
plate ; c) a quartz wedge ; d) a gypsum plate, red of the first order. 
Eyepieces are the Huyghenian, objectives of Series II. 
A polished case with handle, lock and key, drawer for accessories and 
receptacles for eyepieces and objectives, accompanies the outfit. 
L. Stand with plain revolving stage and 1 eyepiece, provided with cross hairs, $125.00 
LI. Stand with plain revolving stage and 1 eyepiece, and f in and 4 in. objectives, 148.00 
L2. Stand with plain revolving stage and 2 eyepieces (one provided with cross hairs), 
and f in. and in. objectives, ------- 15200 
LL. Stand with mechanical stage No. 1728, and 1 eyepiece provided wilh cross hairs, 142.00 
LL1. Stand with mechanical stage No. 1728, and 1 eyepiece, and f in. and 4 in. 
objectives, - - - - - - - - 165.00 
LL2. Stand with mechanical stage No. 1728, and 2 eyepieces (one provided with cross 
hairs), and f in. and 4 in. objectives, - - - 169 00 
LL3. Stand with mechanical stage No. 1728, and 2 eyepieces (one provided with cross 
hairs), and 2 in., f in. and in. objectives, - - - - - 175.00 
LL4. Stand with mechanical stage No. 1728, and 2 eyepieces (one provided with cross 
hairs), and 2 in., f in., 4 in. and l/% in. objectives, - - - 193.00 
Double nosepiece brass finish, extra, - 5.00 
Triple nosepiece, brass finish, extra, ------ 9.00 
Bertrand’s quadrant eyepiece with revolving prism, extra, - 16.50 
Prices of separate petrographical accessories will be found on another page. 
For table of magnifying powers refer to page 47. 32 
BAUSCH & LOMB OPTICAL COMPANY, 
(Cut one-third of actual size.) 
M — LABORATORY MICROSCOrE. Combined Inverted and Vertical 
[Rioposoopes. 
The principles involved in the microscopes described on this and the following 
pages, are to the best of our knowledge entirely new. Although the Inverted 
microscope has been used for some time, it does not seem to have occured to 
any one to combine this, which is used for special work, with the ordinary 
vertical instrument. There is no question that the fact, that the Inverted could 
only be used as such and that it was but incomplete at the best, has precluded 
its more general use, and we have no doubt, that offering them as we do now, 
by combining two instruments in one and supplying each with such complete 
adjustments as modern requirements demand, they will be found to fill a 
necessity in certain branches and prove a great convenience in others. 
In the Inverted microscope, the usual conditions are reversed. The mirror 
is above the stage, while the objective is below it, and the object is therefore 
viewed from the lower side instead of from the upper one. After the rays have 
passed through the objective, they must be given an upward direction, so that 
the image which they form may be viewed ; and in order to accomplish this, 
we make use of a four-sided prism, of which we give a sectional cut, its angles 
being respectively 57°, 150°, 48°, 105°. The prism is large and its surfaces 
accurately made, so that there is no noticeable depreciation in light and none 
at all in definition. 
This form of instrument is particularly adapted for chemical investigations, 
diatomaceae and other objects in water. 
For examinations with low powers, the ordinary slide may be used, but for 
high powers, a cover glass of proper dimensions may be substituted. 
We make these instruments in two styles. 34 
BAUSCH & LOMB OPTICAL COMPANY, 
N — UNIVERSITY MICROSCOrE. 
(Cut one-third of actual sized ROCHESTER, N. Y., AND NEW YORK CITY. 
35 
IMI-LABORATORY MICROSCOPE. 
In this microscope the pillar and arm are japanned. The stage is of solid 
metal and provided with spring clips. The mirror-bar swings on an axis in 
the plane of the stage, to any point above or below it. The mirrors are plane 
and concave and adjustable on the mirror-bar, as is also the sub-stage. This 
carries a revolving diaphragm, and is fixed on a pivot so that it will swing in 
or out of the optical axis. The coarse adjustment is by rack and pinion ; 
the fine adjustment by micrometer screw acting on our patent movement. 
Attached to the slide is the arm, to the lower side of which is fastened the 
prism-box ; on the upper horizontal surface is the nosepiece, with an extra 
adapter for high powers ; in the oblique surface is a screw socket, to which the 
tube attaches ; this is provided with cloth lining and has draw-tube. 
To transform the instrument into an ordinary microscope, the tube is 
unscrewed, the milled head at the front of the arm loosened, which releases 
the prism-box, and the arm is swung on its axis from between the pillars 
into an upright position. The tube is now attached to the opposite side of 
the nosepiece and, after the clips are reversed, it is ready for work. 
Jtt. Stand with 1 Huyghenian eyepiece (any power) in polished case with 
handle, lock and key, - $45.00 
IsT-university MICROSCOPE. 
This instrument is in its general construction similar to the Laboratory. 
It is, however, made entirely of brass, with the exception of the stage, which 
consists of a heavy glass plate, mounted in a solid brass ring. The base is 
of the tripod form, of graceful construction. One solid pillar supports the 
instrument. In transforming this into an ordinary instrument, the tube and 
prism-box are removed as in the preceding, and the instrument is swung on 
its axis, which is the same as that of the mirror bar, into an upright position. 
The instrument may be used in an upright or inclined position. 
N. Stand with 1 Huyghenian eyepiece (any power) in polished case with 
handle, lock and key, - $70.00 36 
BAUSCH & LOMB OPTICAL COMPANY, 
BINOCULAR TUBE AND NOSEPIECE WITH PRISM ATTACHMENT. ROCHESTER, N. Y., AND NEW YORK CITY. 
37 
BINOCULAR MICROSCOPES. 
(Patented Feb. 12, 1884.) 
The purpose of the Binocular microscope is to give a stereoscopic vision 
of objects, whereby their form, relative distance and position of the various 
parts are most plainly seen. We use the plan devised by Mr. Wenham, but 
with the modification that the prism is held by a swinging carrier instead 
of being in a sliding box. This plan admits no dust and leaves the tube 
unobstructed when the monocular tube only is used. 
Eyepieces are the Huyghenian, objectives of Series II. 
Polished case with receptacles for eyepieces and objectives accompanies 
the outfit. 
F Binocular. Model stand with binocular body, 1 pair of eyepieces, - - $45.00 
F Binocular 1. Model stand with 1 pair of eyepieces and £ in and l in objectives, 68.00 
F Binocular 2. Model stand with 1 pair of eyepieces and 2 in., £ in. and in. 
objectives, - - - - - - - - 74.00 
Gr Binocular. Physician stand with binocular body, 1 pair of eyepieces, - 60.00 
Gr Binocular 1. Physician stand with 1 pair of eyepieces and £ in. and it in. objectives, 83.00 
G Binocular 2. Physician stand with 1 pair of eyepieces and 2 in., £ in. and in. 
objectives, ------- - 89.00 
H Binocular. Investigator stand with binocular body, 1 pair of eyepieces, - 65.00 
H Binocular 1. Investigator stand with 1 pair of eyepieces and £ in. and it in. 
objectives, - - - - - - - - 88 00 
H Binocular 2. Investigator stand with 1 pair of eyepieces and 2 in., £ in. and \ in. 
objectives, ------- 94.00 
J Binocular. Universal stand with binocular body, 1 pair of eyepieces, - 75.00 
J Binocular 1. Universal stand with 1 pair of eyepieces and £ in. and \ in. objectives, 98.00 
J Binocular 2. Universal stand with 1 pair of eyepieces and 2. in., £ in. and 4 in. 
objectives, ------- 104.00 
All of the above have arrangement for pupillary distance by a sliding adjustment. 
K Binocular. Professional stand with binocular body, adjustment for pupillary 
distance by rack and pinion, 1 pair of eyepieces, - - 175.00 
K Binocular 1. Professional stand with 1 pair of eyepieces and £ in. and \ in. 
objectives, ------- 198.00 
K Binocular 2. Professional stand with 1 pair of eyepieces and 2 in., £ in. and \ in. 
objectives, ------- 204.00 
K Binocular 3. Professional stand with 2 pair of eyepieces and £ in. and in. 
objectives, ------- 206.00 
K Binocular 4. Professional stand with 2 pair of eyepieces and 2 in., £ in, and \ in. 
objectives, ------- 212.00 
Binocular body with sliding adjustment for pupillary distance, fitted to rack of 
any of our monocular microscopes, with 1 pair of eyepieces, extra, - 27.50 
(When so ordered, stand must in every case be sent on for adaptation.) Simple Miep©se©pes. 
(Cut full size.) 
R —HANDY DISSECTING MICROSCOPE. 
(Cut two-thirds of actual size.) 
S — EXCELSIOR POCKET AND DISSECTING MICROSCOPE. ROCHESTER, 
N. Y., AND NEW YORK CITY. 
39 
IR-handy dissecting microscope. 
The dissecting microscopes represented on the previous page are very 
efficient and convenient for examination of minerals, insects, flowers, etc. 
They consist of an iron base with glass plate inlaid, forming a white 
back ground. A steel stem is screwed into the base plate, to which the magnifier 
is fitted and arranged to slide. The magnifiers are furnished with one, two or 
three lenses, which give a power of from 5 to 25 diameters. Those with two 
or three lenses are provided with a diaphragm which secures distinctness of 
definition. 
The stem can be easily unscrewed, and the whole packed in a small box. 
Nickel plated pliers are furnished with the instruments. 
Rl, with one lens, - -- -- -- -- $1.25 
R2, with two lenses, - -- -- -- - 1.50 
R3, with three lenses, - -- -- -- -- 2.00 
R4r, with three lenses, magnifier not in folding case, as shown, - 1.25 
S-EXCELSIOR POCKET AND DISSECTING 
MICROSCOPE. 
This instrument consists of a small wooden case, to one end of the lid is 
attached one of the ends of the box, which, when reversed, forms a stand for 
the lenses and stage. These are supported by a steel rod, D, the lower end 
of which is hinged to the lid so that it may be turned down and lie in a groove. 
The glass stage, G, and magnifier are adjustable, and the former may be fixed 
by the set-screw. An adjustable mirror, H, is fitted into the case, by means 
of which light may be reflected on the objects ; when these are opaque, all 
transmitted light may be shut off by the stop, N. Dissecting needles, K and L., 
with neat handles, fit into appropriate grooves. 
As a dissecting microscope for botanical and entomological work, this 
instrument is very efficient. The glass plate in the stage forms a cell for holding 
water, so that aquatic animals may be examined. The lenses and stage may be 
packed in the case, which readily admits of its being carried in the vest pocket. 
The lenses may be used either singly or together ; are well made, and are 
provided with a proper diaphragm which secures distinctness of definition. 
They give a range of power of from five to twenty-five diameters. Under good 
management they show the individual corpuscles in the blood of the frog, and 
will exhibit very clearly the circulation in the foot of this animal. 
51, with two lenses, --------- $2.00 
52, with three lenses, -------- - 2.25 
53, set of three hard rubber slides, with opening of different kinds, to serve as linen 
provers, - -- -- -- -- - 0.25 40 
BAUSCH & LOMB OPTICAL COMPANY, 
T — PRIMARY DISSECTING MICROSCOPE. 
(Cut one-half of actual size.) 
(Cut one-half oi actual size.) 
u —EDUCATIONAL DISSECTING MICROSCOPE, ROCHESTER, N. Y., AND NEW YORK CITY. 
41 
T-primary dissecting microscope. 
This represents a most effective and low priced dissecting instrument. The 
body is a solid block of wood so shaped that the sides serve the purpose of hand 
rests : mirror and movable glass stage plate are provided for in a simple manner. 
The lens holder slides in a brass tube driven into a hole in the block. The lens 
is of 1 in. focus and mounted in hard rubber. 
Tl, as above, ---------- $2.00 
T2, with 2 mounted lenses of 2 in. and 1 in. focus, ----- 3.00 
Single lenses, mounted of f in., £ in., or \ in. focus, extra, each, - - 1.00 
IT -EDUCATIONAL DISSECTING 
MICROSCOPE. 
This instrument has been specially designed for class and laboratory use, 
and is of the utmost simplicity, nothing, however, having been sacrificed of its 
thorough efficiency. The base is of japanned iron ; the pillar is of finished 
brass, and contained therein is the sliding rod, provided with projecting pin ; 
the arm is partly adjustable in the rod ; the stage is of bronzed brass provided 
with spring clips. The mirror is concave, and on the opposite side has a white 
opaque surface. The instrument is supplied in cherry case with handle. 
Ul, with 1 mounted lens of 1 in. focus, ...... $6.00 
U2, with 2 mounted lenses of 2 in. and 1 in. focus, - 7.00 
Arm for lenses, with joint in place of single arm, extra, - - - 1.00 
Single lenses mounted of f in., in. or in focus, extra, each, ... 1.00 42 
BAUSCH & LOME OPTICAL COMPANY, 
(Cut one-third ot actual size.) 
Y —FOLDING DISSECTINC MICROSCOPE. ROCHESTER, N. Y., AND NEW YORK CITY. 
43 
"V—FOLDING DISSECTING MICROSCOPE. 
(Pat. Aug. 3, 1880.) 
This instrument is compact, portable and efficient. It has all the elements 
of the ordinary dissecting microscopes, and besides these the important feature 
that, when folded, it is brought into a very small compass. 
The base is japanned iron. The stage is of brass, blackened, has spring 
clips, and in its center contains a removable glass disc. It is of convenient 
height, so that any amount of work may be done without any fatigue to the 
arms or hands. The arm holding the lenses is adjustable in a triangular 
rack-rod, and is arranged with society screw, thus permitting the use of low- 
power objectives. The rack and pinion give a perfectly smooth adjustment. 
The mirror is detachable from the base, and can be readily attached to the stage 
for oblique light or illumination of opaque objects. The brass work is all 
highly finished and lacquered. In folding, the rack is brought down and arm 
detached, the stage swings backwards on the pillar and the base on the stage, 
so that the space occupied is merely the size of the base, and thickness of this, 
stage and arm. 
Mounted lenses, of 2 and 1 in. focus, and nickel-plated pliers accompany 
the instrument, and are so arranged that they may be used singly or in 
conjunction. The whole packed in a neat case. Grooves are provided 
on lower surface of stage to receive brass hand-rests. 
Y, as above, ---------- $12.00 
Compound erecting body, extra, ------- 12.00 
Hand-rests as shown in cut, per pair, ------ 2.00 
Arm for lenses, with joint in place of single arm, extra, - - - - 1.00 
Single lenses, mounted, of £ in., £ in. or £ in. focus, extra, each, - - 1.00 
Coddington magnifiers, 1 in,, f in. or £ in. focus, extra, each, - - - 2.50 
Achromatic Triplets, giving large flat field with beautiful definition, 1 in., £ in. 
or £ in. focus, extra, each, ------- 6.00 Objectives. 
Our list of objectives has been added to from time to time, and now embraces 
a variety from which a suitable selection may be made for every field of inves- 
tigation. Our objectives are all carefully computed for the utmost freedom 
of color, largest amount of light, greatest working distance, and extreme flatness 
of field for their respective angular apertures and magnifying powers. The 
process of production is carried out on a system which was developed after 
constant efforts to reach the highest results, and eliminates every possibility 
of chance, so common' to optical work generally. A faulty objective never 
leaves our hands, and every opportunity for improvement is utilized. The 
glass employed is of the celebrated Jena production, but only such is used, 
which after years of constant use has proven itself to be not liable to the 
least deterioration. The many thousands of objectives which are in constant 
use, and the constantly increasing demand, fully attest their comparative merits 
as well as moderate prices. 
Our objectives are all classified according to their numerical aperture and 
divided into series. We draw particular attention to the fact that all of our 
objectives have our name in full, “ Bausch & Tomb Optical Co.,” cut upon them. 
We deem this necessary, as we often learn that unscrupulous parties palm off 
worthless productions as ours which are similar in appearance. All objectives 
have the standard society screw and are furnished in neatly finished brass boxes. 
All non-adjustable objectives are corrected for a cover thickness of 0.16 mm. 
(about 0.006 in.), and the medium point of adjustment in all adjustable objectives 
is for the same thickness. This thickness is about the average in the No. 2 
cover glass, but there is a wide difference between the two extremes. While a 
variation in thickness of the cover glass is admissible in the low powers, it 
disturbs the correction in medium powers and very considerably so in high 
powers, and, as a consequence, objectives fail proportionately to give good 
results. Cover glasses should therefore either be measured, for which purpose 
our Cover Glass Gauge is admirably adapted, and to which we call particular 
attention, or where means will permit, adjustable objectives should be selected. 
With these it is possible to obtain the highest degree of their performance under 
any condition, and where correct thickness is used, they may be left at the 
medium point of adjustment. NUMERICAL APERTURE TABLE. 
(Reprint from “ The Journal of the Royal Microscopical Society.) 
NUMERICAL 
APERTURE. 
(n sin k = a.) 
Corresponding Angle 
(2 u) for 
Limit of Resolving Power, in Lines to an Inch. 
Illuminating 
Power. 
(a 2.) 
Pene- 
trating 
Power 
(0 
Air 
(ft = 1.00.) 
Water 
(n — 1.33.) 
Homogeneous 
Immersion 
(n = 1.52.J 
White Light. 
(A=0'5269 fr, 
Line E.) 
Monochromatic 
(Blue) Light 
(A=--0'48(51 m, 
Line F.) 
j Photography 
' (A=0*4000 fi, 
Near Line h.) 
1.52 
180° 0' 
146,543 
158,845 
193,037 
2.310 
.658 
1.51 
166° 51' 
145,579 
157,800 
191.767 
2.280 
.662 
1.50 
161° 23' 
144,615 
156.755 
190,497 
2.250 
.667 
1.49 
157° 12' 
143,651 
155,710 
189,227 
2.220 
.671 
1.48 
153° 39' 
142,687 
154,665 
187,957 
2.190 
.676 
1.47 
150° 32' 
141,723 
153,620 
186,687 
2.161 
.680 
1.40 
147° 42' 
140,759 
152,575 
185,417 
2.132 
.685 
145 
145° 6 
139,795 
151.530 
184,147 
2.103 
.690 
1.44 
142° 39 
138,830 
150,485 
182,877 
2.074 
.694 
1.43 
140° 22' 
137,866 
149,440 
181,607 
2.045 
.699 
1.42 
.. 
138° 12' 
136,902 
148,395 
180,337 
2.016 
.704 
1.41 
136° 8' 
135,938 
147,350 
179,0i*7 
1.9^8 
.709 
1.40 
134° 10' 
134,974 
146,305 
177,797 
1.960 
.714 
1.39 
132° 16' 
134.010 
145,260 
176,527 
1.932 
.719 
1 38 
130° 26' 
133.046 
144,215 
175,257 
1.904 
.725 
1.37 
128° 40' 
132,082 
143,170 
173,987 - 
1.877 
.729 
l 30 
126° 58' 
131,118 
142,125 
172,717 
1.850 
.735 
1.35 
125° 18' 
130.154 
141,080 
171,447 
1.823 
.741 
1.34 
123° 40' 
129,189 
140,035 
170.177 
1.796 
. 746 
1.33 
180° 0' 
122° 6' 
128,225 
138,989 
168,907 
1.769 
.752 
1.32 
165° 56 
120° 33' 
127,261 
137,944 
167,637 
1.742 
.758 
1.30 
155° 38' 
117° 35’ 
125,333 
135,851 
165,097 
1.690 
.769 
1 -28 
148° 42' 
114° 44' 
123,405 
133,764 
162,557 
1.638 
.781 
1.20 
142° 39 
111° 59' 
121,477 
131,674 
160,017 
1.588 
.794 
1.24 
137° 36' 
109° 20' 
119,548 
129,584 
157,477 
1.538 
.806 
1.22 
133° 4' 
106° 45' 
117,620 
127,494 
154,937 
1.488 
.820 
1.20 
128° 55' 
104° 15' 
115,692 
125,404 
152,397 
1.440 
.833 
1.18 
125° 3' 
101° 50' 
113,764 
123,314 
149,857 
1.392 
.847 
1.10 
121° 26 
99° 29 
111,835 
121,224 
147,317 
1.346 
.862 
1.14 
118° 0' 
97° 11' 
109.907 
119,134 
144,777 
1.300 
.877 
1.12 
114° 44' 
94° 55' 
107,979 
117 044 
142,237 
1.254 
.893 
1.10 
111° 36' 
92° 43’ 
106,051 
114,954 
139,698 
1.210 
.909 
1.08 
108° 36' 
90° 34' 
104,123 
112,864 
137,158 
1.166 
.926 
1 00 
105° 42' 
88° 27' 
102,195 
110,774 
134,618 
1.124 
.943 
1.04 
102° 53' 
86° 21' 
100,266 
108,684 
132,078 
1.082 
.962 
1.02 
100° 10' 
84° 18' 
98,338 
106,593 
129.538 
1.040 
.980 
1.00 
180° 0' 
97° 31' 
82°, 17' 
96,410 
104,503 
126,998 
1.000 
1.000 
0.98 
157° 2 
94° 56' 
80° 17' 
94,482 
102,413 
124,458 
.960 
1.020 
0.90 
147° 29' 
92° 24' 
78° 20' 
92,554 
100,323 
121,918 
.922 
1.042 
0.94 
140° 6' 
89° 56 
76° 24 
90,625 
98,233 
119,378 
.884 
1.064 
0.92 
133° 51' 
87° 32' 
74° 30' 
88,697 
96,143 
116,838 
.846 
1.087 
0.90 
128° 19' 
85° 10' 
72° 36 
86,769 
94,053 
114,298 
.810 
1.111 
0.88 
123° 17' 
82° 51' 
70° 44' 
84.841 
91,963 
111,758 
.774 
1.136 
0.80 
118° 38' 
80° 34' 
68° 54' 
82,913 
89,873 
109,218 
.740 
1.163 
0.84 
114° 17' 
78° 20' 
67° 6' 
80,984 
87,783 
106,678 
.706 
1.190 
0.82 
110° 10' 
76° 8' 
65° 18 
79,056 
85,693 
104,138 
.672 
1.220 
0.80 
106° 16' 
73° 58' 
63° 31' 
77,128 
83,603 
101,598 
.640 
1.250 
0.7S 
102° 31' 
71° 49' 
61° 45 
75,200 
81,513 
99,058 
.608 
1.282 
0.70 
98° 56' 
69° 42' 
60° 0' 
73,272 
79,423 
96,518 
.578 
1.316 
0.74 
95° 28' 
67° 37' 
58° 16' 
71,343 
77,333 
93,979 
.548 
1.351 
0.72 
92° 06' 
65° 32' 
56° 32' 
69.415 
75,242 
91,439 
.518 
1.389 
0.70 
88° 51' 
63° 31' 
54° 50' 
67,487 
73.152 
88,899 
.490 
1.429 
0.08 
85° 41' 
61° 30' 
53° 9 
65,559 
71 062 
86,359 
.462 
1 471 
0.00 
82° 36' 
59° 30’ 
51° 28' 
63,631 
68,972 
83,819 
.436 
1.515 
0.04 
79° 36' 
57° 31' 
49° 48' 
61,702 
66,882 
81,279 
.410 
1.562 
0.02 
76° 38' 
55° 34 
48° 9' 
59,774 
64,792 
78,739 
.384 
1.613 
0.00 
73° 44' 
53° 38 
46° 30’ 
57,846 
62,702 
76,199 
.360 
1.667 
0.58 
70° 54' 
51° 42' 
44° 51' 
55,918 
60,612 
73,659 
.336 
1.724 
0.50 
68° 6' 
49° 48' 
43° 14' 
53,990 
58.522 
71,119 
.314 
1.786 
0.54 
65° 22' 
47° 54' 
41° 37' 
52,061 
56,432 
68,579 
.292 
1.852 
0.52 
62° 40' 
46° 2' 
40° 0' 
50,133 
54,342 
66,039 
.270 
1.923 
0.50 
60° 0' 
44° 10' 
38° 24' 
48.205 
52,252 
63,499 
.250 
2.000 
0.45 
53° 30' 
39° 33' 
34° 27' 
43,385 
47,026 
57,149 
.203 
2.222 
0.40 
47° 9' 
35° 0’ 
30° 31’ 
38,564 
41,801 
50,799 
.160 
2.500 
0.35 
40° 58' 
30° 30' 
26° 38' 
33,744 
36,576 
44,449 
.123 
2.857 
0.30 
34° 56' 
26° 4' 
22° 46 
28,923 
31,351 
38,099 
.090 
3.333 
0.25 
28° 58' 
21° 40 
18° 56' 
24,103 
26,126 
31,749 
.063 
4.000 
0.20 
23° 4' 
17° 18' 
15° 7’ 
19 282 
20,901 
25,400 
.040 
5.000 
015 
17° 14' 
12° 58' 
11° 19' 
14,462 
15,676 
19,050 
.023 
6.667 
0.10 
11° 29' 
8° 38' 
7° 34' 
9,641 
10,450 
12,700 
.010 
10.000 
0 05 
5° 44' 
4° 18' 
3° 46' 
4.821 
5,252 
6,350 
.003 
20.000 ROCHESTER, N. V., AND NEW YORK CITY. 
47 
LINEAR MAGNIFYING POWERS OF OBJECTIVES AND EYEPIECES. 
STANDARD TUBE LENGTH, 8.5 in., 216 mm. 
Objectives. 8 in. 2 in. 1£ in. 1 in. f in. £ in. \ in. 
f 2 in. (A) 15 25 33 40 50 70 176 
11 in. (B) 21 35 42 55 70 102 247 
eyepieces 1 in. (C) 30 50 66 80 100 140 353 
| in. (D) 42 70 84 110 140 205 495 
l 1 in. (E) 60 100 132 160 200 280 705 
STANDARD TUBE LENGTH, 8.5 in., 216 mm. TUBE LENGTH, 160 mm. 
. 
Objectives. } in. } in. 1 in. y in. in in. 2 in. f in. 1 in. in. 
f 2 in. (A) 210 265 360 450 570 690 18 29 135 460 
I 1| in. (B) 295 885 540 660 845 1025 26 42 260 675 
EYF- ' 
■{ 1 in. (C) 420 530 720 900 1140 1380 37 58 370 920 
PIECES 
| in. (1)) 590 770 1080 1320 1690 2050 52 84 520 1350 
1 in. (E) 840 1060 1440 1800 2280 2760 74 116 740 1840 
INSTRUCTIONS FOR USING EYEPIECE MICROMETER. 
As the eyepiece micrometer is not compared directly with the object itself, 
but only with the image of it formed in the focus of the eyepiece, it is only when 
the exact proportion between the size of the object and that of its image is 
known, that measurements of the object can be readily determined by the 
eyepiece micrometer. 
This proportion depends upon : 1st, the focus of the objective ; 2d, the 
distance of the image from the object; 3d, the focus and the place of the 
field-lens when the latter is situated between the objective and the image. 
As these relative conditions are not of equal value in all microscopes, and 
consequently the relative sizes of the images, as formed by different objectives 
of the same rating, are not always the same, these sizes have to be ascertained 
for each microscope and objective separately. 
To reach this result, a reliable stage micrometer should be used as an object, 
and its image accurately measured with the eyepiece micrometer. 
The figures designate the proportion of the linear measure of the object, the 
latter being taken as 1. 
The actual size of any object is therefore obtained when the size of its image, 
which is obtained by direct measurement by means of the eyepiece micrometer, 
is divided by the figures so obtained. 
For adjustable objectives, the figures are intended for close adjustment. 
In instruments having draw-tube, make measurements when tube is at 
standard length. 
25.4 mm—1 in 48 
BAUSCH & LOME OPTICAL COMPANY, 
OBJECTIVES—SERIES I. 
(Old Biological Series.) 
These objectives were specially designed for the Continental Microscopes, 
and are corrected for the short tube length of 160.0 mm. They are therefore not 
suited for use with our other instruments unless the length of tube is decreased 
to the proper point by means of the draw-tube. They are intended for biological 
investigations and give results which are unsurpassed by any European produc- 
tions. The | in. has an unusual flatness of field with excellent definition ; the 
in. has an excellent resolving power, resolving P. Angulatum easily with central 
light and good working distance ; the y in. oil immersion is mounted 
in non-adjustable mounting, and so perfectly corrected that it will resolve A. 
Pellucida in balsam ; it is well suited to the study of Bacteriology and all work 
requiring a higher power than the dry objective. 
NUMBER. 
FOCUS. 
NUMERICAL AP. 
PRICE. 
1000, 
2 in. 
0.10 
$ 6.00 
1002, 
t in- 
0.25 
7.00 
1004, 
£ in. 
0.85 
15.00 
1006, 
* • Oil 
JJ Immersion. 
1.25 
45.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
49 
OBJECTIVES—SERIES II. 
(Old Student Series). 
These objectives possess qualities which fit them excellently for the 
requirements of every-day work. They are unexcelled by any objectives of 
approximate price, and indeed by many which are higher in cost and more 
pretentious. We use them in making up our outfits. 
The lower powers of this Seiies up to \\ in. are composed of a single 
system triplet ; they give good definition. The 1 in., f- in. and \ in. are two 
system, of excellent definition and exceptionally flat field. The remainder of 
the Series are three system and offer various advantages. The in. N. A. 0.62 
and in. N. A. 0.62 are especially designed lenses, having extra ordinary long 
working distance, sufficient to illuminate opaque objects, and they resolve P. 
Angulatum by oblique light; their resolving power, however, does not equal that 
of the £ in., N. A. 0.77, and in., N. A. 0.82, which both resolve P. Angulatum 
easily by central light. Unless it is expressly stated which objectives are desired, 
we always send the f in. and \ in., N A. 0.82., with our instruments. The \ in. 
is good for general histological work where higher power is desired, although 
on account of the unavoidable loss of light, we recommend objectives of higher 
numerical aperture when these powers are required. 
NUMBER. 
FOCUS. 
NUMERICAL AP. 
ADJUSTMENT. 
PRICE. 
1020 
3 in. 
0.8 
Non-Adjustable. 
$ 6.00 
1022 
2 in. 
0.10 
“ 
6.00 
1024 
H in- 
0.14 
“ 
6.00 
1026 
1 in. 
0.18 
t « 
6.00 
1028 
| in. 
0.24 
< ( 
8.00 
1080 
i in. 
0.36 
i < 
9.00 
1032 
| in. 
0.62 
( i 
14.00 
1034 
i in- 
0.77 
4 4 
14.00 
1036 
i in- 
0.62 
4 4 
15.00 
1038 
z in- 
0.82 
4 4 
15.00 
1040 
£ in. 
0.85 
18.00 50 
BAUSCH & LOMB OPTICAL COMPANY, 
OBJECTIVES—SERIES III. 
(Old Professional Series). 
These objectives have a better resolving and defining power than th( 
preceeding, and from the fact that they have larger lenses, give better illumi 
nation under the same conditions. They are substituted for those in the outfit 
for the difference in price. 
The 3 to 5 in. is a variable objective. The variation is obtained by a revolv 
ing collar, and when at its highest power has a working distance of \ in., and a 
its lowest power about 2 in. The lower powers from 3 in. to f in. are composec 
of two systems, each in itself achromatic and of such a combination as will giv< 
the highest attainable results. The 3 in., 2 in. and \\ in. have a particularly flai 
field. In the immersion objectives the front is not affected by fluids. The | in 
resolves P. Angulatum with oblique light. The \ in., \ in. and \ in. are newlj 
constructed objectives of excellent capacity, resolving No. 17 of Moeller’s test 
plate, and possess such working distance that no difficulty is experienced in com- 
fortably working through any cover glass thickness. They are well suited to 
biological investigations, giving results closely approaching immersion objectives, 
The water immersion objectives are notable for their long working distance 
and clearness of definition. 
The oil immersion are mounted in both fixed and adjustable mountings. 
They are admirable objectives, adapted to close work of every day occurrence, 
in which very large working distance and excellent resolving power are required. 
They will resolve A. Pellucida in balsam. 
A phial of immersion fluid accompanies each objective. 
The oil immersion T in. referred to in all microscope outfits is the one 
in non-adjustable mounting. 
NUMBER. 
FOCUS. 
NUMERICAL AP. 
ADJUSTMENT. 
PRICE. 
1060 
3 to 5 in. 
Dry. 
Variable. 
$18.00 
1062 
3 
0.10 
Non-Adjustable. 
13.00 
1064 
2 
0.14 
13.00 
1066 
11 “ 
1 Z 
0.20 
“ 
“ 
15.00 
1068 
1 
0.31 
“ 
“ 
15.00 
1070 
3 <« 
¥ 
0.35 
“ 
“ 
15.00 
1072 
1 
Z 
0.54 
“ 
“ 
18.00 
1074 
1 <* 
¥ 
0.88 
“ 
Adjustable. 
24.00 
1076 
1 
Z 
0.90 
“ 
“ 
28.00 
1078 
1 “ 
Z 
0.92 
“ 
“ 
30.00 
1090 
1 “ 
z 
0.99 
Water Im. 
“ 
25.00 
1092 
* 
0.99 
“ 
“ 
28.00 
1094 
1 
T* 
0.99 
“ 
“ 
30.00 
1096 
1 
0.99 
“ 
“ 
35.00 
1100 
1 << 
Z • 
1.18 
Oil Im. 
Non-Adjustable. 
40.00 
1102 
1 “ 
TU 
1.18 
“ 
“ 
40.00 
1104 
1 “ 
1.18 
“ 
45.00 
1106 
1 “ 
TZ 
1.18 | 
“ 
55.00 
Nos. 1100, 1102, 1104, 1106 in adjustable mounting with graduated silvered collar, 
extra, .......... $10.00 ROCHESTER, N. V., AND NEW YORK CITY. 
51 
OBJECTIVES—SERIES IV. 
(Old First-Class Series.) 
These objectives are of the highest attainable perfection, and we believe 
stand unrivaled. They will bear almost any amount of amplification. The 
in. stands pre-eminent as a dry objective, and is particularly valuable on 
account of its freedom from inconvenience of immersion fluids. It resolves 
No. 18 of Moeller’s balsam plate ; its adjustment is by rectilinear movement 
of the posterior system, and it has graduated and silvered collar. 
The oil immersion objectives are four system, and we believe are unequalled 
in those qualities which are necessary in objectives of this class—extreme 
angular aperture with large working distance, resolution and flatness of field. 
Their numerical aperture is not less than 1.40, and the resolving power is 
commensurate with it. 
After considering the fact that the slightest variation in immersion fluid 
and length of tube, change of eyepieces, cover-glasses of different refraction, 
in a word, circumstances differing in the slightest degree from those under 
which the objective was corrected, seriously affect its utility ; and believing 
that the highest grade immersion objective should work equally well under 
any of these conditions, we have decided to make the above series in adjustable 
mountings only. 
A phial of immersion fluid accompanies each objective. 
NUMBER. 
FOCUS. 
NUMERICAL AP. 
ADJUSTMENT. 
PRICE. 
1120 
i in. 
0.94 
Dry. 
Adjustable. 
$40.00 
1122 
i “ 
1.40 
Oil Immersion, 
“ 
75.00 
1124 
tV 
1.40 
“ 
“ 
80.00 
1126 
T5 
1.40 
“ 
“ 
90.00 
1128 
tV 
1.40 
“ “ 
“ 
125.00 EYepieGes. 
Our regular eyepieces are all provided with adjustable cap on eye lens ; 
they give the largest and flattest possible field. We have adopted the par-focal 
plan and nomenclature as recommended by the committee of the American 
Society of Microscopists on eyepieces, which is the same as that used on 
objectives, and designates them according to the equivalent foci of the lenses. 
This method gives an approximate idea of the amplification. 
All of these eyepieces, except when they vary from our standards, are so 
constructed that the neck or small tube, flange with milled edge, and large 
tube, are made of continuous metal, which insures not only extreme rigidity,, 
but enables us to make the various parts exactly true with one another. 
In addition to the above regular eyepieces, we make a series after the 
so-called Continental pattern, which consists of a straight tube, with the eye-lens 
and field-lens attached at each respective end. They are entirely contained in 
the tube of the microscope with the exception of the mounting for eye-lens and 
are intended to be used particularly with the Continental microscopes 
The solid eyepieces consist of one piece of homogeneous glass. They are 
fixed in a standard size mounting which slips into an adapter for microscope 
tube. 
The tubes of our microscopes take eyepieces of the following sizes : 
A, B, C, D, E, F, G, L, M and N, 26.8 mm. diam. 
H and J, 30.5 mm. diam. 
K, - - - - - 38.6 mm. diam. ROCHESTER, N. Y., AND NEW YORK CITY. 
53 
HUYGHENIAN. 
CONTINENTAL 
HUYGHENIAN EYEPIECES. 
No. Price. 
1500, 2 in.. - - - - - - - - - $ 4.00 
1502, 1£ in-> 4.00 
1504, 1 in., - -- -- -- -- - 4 00 
1506, | in., 4.00 
1508, | in., - - ' 4.00 
1504, 1506 and 1508 can be arranged with slot to receive micrometer No. 1734 ; 
covered by cap to exclude light, eye-lens being adjustable for focus with 
micrometer No. 1734, extra, ------ 1,75 
1500 and 1502 can only be used with micrometer No. 1736, 
CONTINENTAL EYEPIECES. 
No. Price. 
1520, 2 in., $ 3.00 
1522, 1| in., 3.00 
1524, 1 in., 3.00 
1526, f in., - - - - - - - - - - 3.00 
1528, i in., - - 3.00 
Micrometer No. 1736 can only be used with the above. 
SOLID EYEPIECES. 
No. Price. 
1540, in., with adapter for any size tube, ------ $ 6.00 
1542, in., with adapter for any size tube, ..... 6.00 
1544, J in., with adapter for any size tube, - - - - - - 6.00 
1546, in., with adapter for any size tube, ..... 6.00 
1548, | in., with adapter for any size tube, ------ 6.00 
When orders for eyepieces are given by measurement for other instruments than our own, 
we follow them exactly ; but our experience has shown that this method is unreliable from the 
fact that the ordinary means of measuring are not sufficiently accurate. We would suggest 
that the best method of informing us of the size desired, is to send us a strip of good paper, of 
such a length that when wound around the eyepiece, the two ends will just meet. 
DIRECTIONS FOR ORDERING EYEPIECES. ®i(iP©fe©mes. 
(Cut one-third of actual size.) 
STUDENT MICROTOME. 
(Pat. September 8, 1885.) 
(Cut one-third of actual size.) 
LABORATORY MICROTOME. ROCHESTER, N. Y., AND NEW YORK CITY. 
55 
MICROTOMES. 
In the Laboratory, the base, curved arm, upright and V-shaped beds are made of one 
continuous casting, thus insuring extreme rigidity, without excessive weight. The knife carry- 
ing block is fitted in the angular way in such a manner that the knife moves steadily through it 
without deviating from its plane and without requiring any extra pressure. Stop-screws with 
soft rubber cushions are fastened at the ends of the way, which serve to overcome any sudden 
concussion, and thus prevent a vibration of the knife. The upper surface of the block is pro- 
vided on its entire length with a grooved slot, to which is fitted a sliding thumb-screw, so that 
the knife may be fastened at any point upon it.' 
The front vertical bed is planed and polished,and is arranged with a grooved slot its full length. 
The adjustable carriage is fitted to it, and may be securely fastened at any point upon it by means 
of two heavy screws. The tightening pin for these, when not in use, has a receptacle in the 
solid bed. It will thus be seen that whether it is desired to make a straight or very oblique cut, 
the carriage with object may be placed at such a point where it is the most convenient in its rela- 
tion to the cutting edge. 
To the carriage are directly fitted the micrometer screw with graduated disk and a slide 
which is acted upon by the former. A provision is made for taking up the possible wear 
on the screw. At one side of the carriage a spring is attached which works in the grooves on 
the edge of the disk with a pronounced click, so that the feed may be controlled without watch- 
ing it; this may be loosened so that it will not act when it is desired to use the index only. A 
lever with ivory handle is connected with the slide in the large size, so that this may be returned 
after the screw has come to the limit of its motion. 
The slide is provided with a grooved slot, which admits of the quick vertical adjustment of the 
universal joint and clamp for specimens of different lengths. The universal joint permits incli- 
nation in any direction, and the clamp is arranged in such a manner that it swings on an axis 
and may be independently adjusted for height, thus giving five different adjustments for the 
specimens. 
The Student is of smaller dimensions, but the construction of bed, curved arm, V-shaped 
bed and knife carrying block is the same. The feed-screw attachment is placed at one end of the 
bed, and for all ordinary work the best position of clamp is as shown in cut. 
A drip-pan is countersunk in the upper surface of the bed, and is easily removable for the 
purpose of cleaning. 
It is impossible to use a knife with a thin edge for all kinds of work, it will invariably nick 
or be otherwise damaged when such a one is used on hard substances ; a knife with an edge 
not ground as thin as they usually are, should be used expressly for cutting hard substances. 
The knives we furnish are made of the very finest English steel and carefhlly tempered. 
No. Price. 
1600, Student Microtome (no case), with knife in cherry case, ... $18.00 
1602, Laboratory Microtome, small size, with knife in morocco case, the whole 
packed in polished case with lock and key, .... 42.50 
1604, Laboratory Microtome, large size, with knife in morocco case, the whole 
packed in polished case with lock and key, - - - 50.00 
1610, Microtome Knife, cutting edge 3J in., in cherry case, each, - 3.00 
1612, Microtome Knife, cutting edge 4 in., in morocco case, each, - - 8.00 
1614, Microtome Knife, cutting edge 6 in., in morocco case, each, ... 10.00 56 
BAUSCH & LOMB OPTICAL COMPANY. 
DIMENSIONS OF MICROTOMES. 
STUDENT. 
Length of bed, ----- 6 in. 
Total height, - - - - - - 4 
Limit of adjustment by micrometer screw, - f 
Limit of adjustment for clamp, - - - 1 
Diameter of graduated disk, - - - If “ 
Pitch of screw, - - - - - W “ 
Length of cutting edge of knife, - - 3f “ 
Graduation on disk, 10. 
LABORATORY, SMALL SIZE. 
Length of bed, - - - . - - - in. 
Total height, ..... 5 “ 
Limit of adjustment by micrometer screw, - ' i “ 
Limit of adjustment for clamp, - - - If “ 
Diameter of graduated disk, - - - 3 “ 
Pitch of screw, - - - - - to “ 
Finest degree of feed, by click, - - - Wot “ 
Length of cutting edge of knife, - - - 4 “ 
Graduation on disk, 40. 
LABORATORY, LARGE SIZE. 
Length of bed, - - - - - - 10 in. 
Total height, ----- 6 “ 
Limit of adjustment by micrometer screw, - f “ 
Limit of adjustment for clamp, - - - if- “ 
Diameter of graduated disk, - - - Sf “ 
Pitch of screw, ..... “ 
Finest degree of feed, by click, - - - ToW “ 
Length of cutting edge of knife, - - 6 “ 
Graduation on disk, 80. ROCHESTER, N. ¥., AND NEW YORK CITY. 
57 
No. 1620. 
No. Price. 
1620, Microtome, - -- -- -- -- $10.00 
This instrument is dissimilar from the foregoing in not having a mechanical 
movement for the knife. It is intended to be fastened to the table-top by means of 
the thumb-screw. The clamp for this specimen, slide and feed-screw are the same 
as in the Student Microtome. Two glass plates are fastened on the top and will 
permit a long sweep of knife. 
No. 10*22. 
1622, Freezing Attachment, -------- 9.00 
This attachment consists of nickel-plated cylinder with atomizer, and is fast- 
ened in the place of the clamp. The object to be frozen is placed upon it. The 
bottle for fluid is connected on one side with the atomizer, on the other with the 
pressure regulating bladder and hand-bulb. Objects may be frozen with it in 
from one to three minutes, and may be easily kept in this condition. This method 
of freezing commends itself for effectiveness, cleanlines and economy in time. 
Ether or Rhigolene may be used. 
(Adaptable to our Student and Laboratory Microtomes, but as fittings vary, state 
when ordering, for which instrument it is intended.) 58 
BAUSCH & LOME OPTICAL COMPANY, 
No. 1624. 
No. Price. 
1624, Knife-Holder, - - - $2.50 
This attachment has been devised for holding other knives than those which are 
especially made for the microtomes. It is provided with a slot, so that it may be 
adjusted upon the block, and with set-screws, so that the angle of the cutting edge 
of the knife may be varied. The knife is firmly fixed by the thumb-screws. 
1626, Section Flattener, ........ 1.25- 
This is an exceedingly simple and effective device for preventing the curling 
of thin sections as they are cut. We must have the knife in order to fit it, however. Mggess© pies. 
The following list of accessories is very complete, and a selection suitable 
to every field of investigation may be made therefrom. Many of the articles 
are original with us, and are only found in this catalogue, and all are carefully 
constructed with a view to their practical application and fully covering the 
purpose for which they are intended. Many articles which within the past few 
years have been found unsuited to modern requirements, have been entirely 
dropped, while others of great utility have been added. Thus many of the 
sub-stage condensers listed in former catalogues have become obsolete and are 
replaced by several new devices for effectually controlling sub-stage illumination. 
It will be observed that we have made a reduction in price in many of our 
accessories. This is in the line of the policy we have followed from the outset, 
and is productive of good results in two directions. By placing a reasonable price 
on a new article, we bring it within the means of many who could not otherwise 
purchase, which again, on account of the increased quantity, enables us to work 
more economically and make a corresponding reduction. While practical utility 
and workmanship are always the first considerations, an opportunity is also given to 
improve in these directions under this policy. 
All the sub-stage accessories are made to one uniform standard, and will fit 
our instruments as well as others constructed on this basis, so that they may 
be ordered separately. 
It is often found that certain accessories are absolutely necessary for certain 
classes of work, whereas the instruments on which they are to be used (and as a 
general thing foreign instruments) are not suited to receive them. In such 
instances we make the required changes and give estimates of cost on inquiry. 60 
BAUSCH & LOMB OPTICAL COMPANY, 
ACCESSORIES. 
No. Price. 
1640, Adapter for foreign objectives, (as there is no standard among foreign objectives, 
all those to be fitted to adapters should be sent us), ... $1.00 
1642, Adapter for fitting objectives in sub-stage, ..... 1.00 
1644, Adapter, same, with centering adjustment, - - - - - 5 00 
1646, Amplifier, achromatic, with society screw, in brass box, .... 7.50 
1648, Blue Glass, Hopkins’, graduated, ...... 3.50 
This glass is in the form of a disk. It revolves upon the adapter and gives inter- 
mediate shades between white and dark blue, both transparent and translucent. 
1650, Camera Lucida. in brass mounting, ...... 1.50 
No. 1644. 
No. 1648. 
No. 1650. 
No. 1652. 
1652, Camera Lucida, Double Prism, ------ 7.50 
It may be used with the instrument in an upright or inclined position, and shows 
the image and pencil point clearly at the same time. It is far superior to the 
Wollaston in size of field and non-distortion of image. 
No. 1654. ROCHESTER, N. Y., AND NEW YORK CITY, 
61 
No. Price- 
1654, Camera Lucida, Improved Abbe, ------ $10.00< 
This form of Camera Lucida is without question the best form in giving dis- 
tinct image of the object and pencil point. To obtain distinct pencil point, a 
series of different colored smoke glasses have been required in the Abbe form, 
which have been inconvenient. Our mounting is improved to take a smoke glass 
wedge, counterbalanced by a transparent wedge to avoid the prism effect, which 
is interposed between the prism and mirror and held by spring clips. Any degree 
of modulation is thus easily obtained. This Camera Lucida is provided with 
adapter to fit the neck of our eyepieces. 
1656, Camera Lucida, Improved Abbe, ------ 11.00 
Same as above, but provided with binding and centering screws, to attach to 
our or other eyepieces as well as microscope tubes. 
In ordering, the outside diameter of tube to be fitted should be given us, prefer- 
ably as in eyepieces. 
No. 1662. 
No. 1660. 
No. 1658. 
1658, Compressor, Wenham’s, ------- 1.50 
1660, Compressor, Parallel, ------- 3.50 
1662, Compressor, new construction, large size. In use by the Bureau of Animal 
Industry for the inspection of pork, ------ 2.00 
1664, Condenser, Bulls-eye, lens in. diameter, ... - 4.00 
1666, Condenser, Bulls-eye, lens in. diameter, - - - - - i 00 
1668, Condenser, Bulls-eye, lens 3 in. diameter, - 10.00 
No. 1668. 62 
BAUSCH & LOMB OPTICAL COMPANY, 
SUB-STAGE CONDENSERS, ABBE. 
The lenses composing these condensers are of such a size that they will 
utilize almost all the rays which may pass through the sub stage ring. Their 
numerical aperture are about 1.20 and 1.42; the former suited for objectives 
of medium angular aperture, the latter will do justice to objectives of the largest 
angular aperture ; its volume of light is sufficient with the highest amplification, 
and although it gives an intense light at the focal point, it may be distributed 
over a larger space, or its volume decreased by varying its distance from the 
object. It will work both dry and immersion. The pin-hole cap provides 
means for exactly centering the condenser. 
These condensers can be fitted to mountings No. 1676 and 1678, as desired. 
The condensers are reversible and adjustable in the adapters, thus they can be 
used on any stand having standard size of sub-stage. 
Optical part of Condenser 1.20 N. A 
Optical part of Condenser 1.42 N. A, 
No. Price. 
1670, Sub-stage Condenser, Abbe. 1.20 N. A., in plain sub-stage adapter, without means 
for regulating light, with pin hole cap, in morocco case, $ 8.00 
1672, Sub-stage Condenser, Abbe, 1.42 N. A., same as above, in morocco case, 10.00 
1674, Sub-stage Condenser, Abbe, achromatic 1.0 N. A , with pin hole cap, in morocco 
case, - -- -- -- -- 20.00 
This condenser gives a colorless image of the source of light. While desirable 
for general work, it is particularly useful in photo-micrography. It is specially 
adapted to mountings No. 1676 and 1678, and when so used the mounting is 
placed between the systems of the condenser. 
1676, Condenser Mounting with five stops and diaphragms and blue glass, - 5.00 
The mounting is simplified to the greatest extent. It is reversible, adjustable 
and can be used on any sub-stage. The diaphragms are separate, and may be 
used so or in conjunction with a blue glass, by dropping into the slide, which 
passes diametrically below the condenser. A click is provided when it is in central 
position. It can be used with Condensers No. 1670, 1672 and 1674. 
No. 1076. ROCHESTER, N. Y., AND NEW YORK CITY. 
63 
No, Price. 
1678, Condenser Mounting, with Iris diaphragm, - - - - $ 6.00 
This mounting offers a ready means for controlling the volume of light, and is 
well suited to the ordinary needs of the physician and student. The diaphragm 
may be decreased from full opening to a pin hole by means of a lever, and a 
graduated scale is provided for making record of the aperture used ; central stops 
and blue glass accompany same. The mounting is reversible and can be attached 
to any sub-stage and may be used with Condensers No. 1670, 1672 and 1674. 
For bacteriological work it is to be preferred to mounting No. 1676. 
No. 1678. 
No. 1682. 
(Showing the swinging sub-stage with Condenser attached as applied to the stage of B 
Continental stand.) 
1682, Swinging Sub-stage Attachment (exclusive of Condenser), - - . - 6.00 
This is adaptable to the stages of all of the Continental, as well as Harvard and 
Model stands. It is simple in construction, yet a very serviceable accessory, being 
adjustable; a Condenser attached to the same can be readily focused ; centering 
arrangement is also provided. 64 
BAUSCH & LOMB OPTICAL COMPANY, 
No. Price 
1684, Sub-stage Attachment complete with mirror, (exclusive of Condenser"), - $25.00 
This complete sub-stage arrangement can be used on any of our microscopes, 
excepting the less expensive forms. It is unquestionably the most perfect of any 
heretofore introduced. Adjustment to the sub-stage is by rack and pinion, the 
Condenser mounting provides a movement similar to No. 1676, but by rack and 
pinion, it also swings on its axis, leaving the Condenser stationary ; it has in 
addition the Iris diaghragm and recess for receiving diaphragms with central stops 
and blue glass, which are furnished with it Mirror is plane and concave and of 
large size. 
No. 1(584. 
Xn. 1(594. 
1686, Diaphragm, Iris, with sub-stage adapter, having society screw, - - 3.00 
1688, Diaphragm Dome, can be used on any substage, - ... 2.00 
State when ordering, whether it is to be inserted in the substage from above or 
below. 
No. 1686. 
No. 1688. ROCHESTER, N. Y., AND NEW YORK CITY. 
65 
No. Price. 
1690, Draw-tube, graduated for any instrument, - $3.00 
1692 Micrometer Screw, graduated and silvered, for fine adjustment, with any of our 
instruments in place of those accompanying them, ... 1.50 
1694, Eyeshade, Ward’s, --------- .50 
The construction of this shade was first suggested by Dr. R. H. Ward. By its 
use both eyes may be kept open, which is less fatiguing than using only one eye. 
It has the advantage over similar devices in price, and that the eyepieces may 
be changed without removing the shade. In ordering, it is necessary to send 
approximately the size of the tube to which it is to be attached. 
No. 1696, 
1696, Eyeshades, Aubert’s Binocular, ...... 1.50 
These eyeshades effectually overcome the reflections which often the 
eyepieces of binocular microscopes. In ordering the diameter of milled edge of 
eyepiece cap should be given. % 
(Patented Aug. 15, 1882). 
No. 1698. 
No. 1704. 
1698, Fine adjustment, Differential Screw, applied to any of our instruments, - 6.00 
As applied to instruments not made by us, ... - 8.00 to 10.00 
As high-power objectives are in more common use than was formerly the case, 
particularly in biological research, it has been found that a more delicate move- 
ment than the ordinary fine adjustments is desirable, and the one we now offer is 
the most simple as well as efficient, and particularly valuable inasmuch as it can 
be applied to almost every existing instrument in which the micrometer screw is 
attached to the arm. It is put in connection with the micrometer screw, and 
comes into play at will by tightening the thumb-screw at the top. The one milled 
head operates one or the other. It can be made to almost any degree of fineness, 
but that which we have found most desirable is the in. for the fine, and in. 
for the Differential Screw fine adjustment, for one revolution of the milled head. 66 
BAUSCH & LOMB OPTICAL COMPANY, 
No. Price. 
1700, Fish Trough, for retaining life in fish while examining circulation of blood in its 
tail, ---------- $2.00 
1702, Illuminator, Hemispherical, an excellent accessory in the resolution of difficult 
tests, - - - - - - - - - 1.50 
1704, Same as above, adjustable, with sub-stage adapter, - 5.00 
1706, Illuminator, Vertical, with rotating diaphragm, in neat brass box, - 4.50 
No. 1708. 
1708, Glass Stage and Slide Carrier, for stages 31 in. diameter, - 5.00 
1710, Holman’s Current-Slide, with cover, in box, ----- 1.50 
No. 1712. 
1712, Holman’s Life Slide, with cover, in box, ----- 1.50 
1714, Holman’s Syphon Slide, cover and flexible tubes, no bottles, - 4.00 
No. 1716. 
1716, Life Box, new construction, ------- 2.50 
1718, Life Box, 2.00 
1720, Life Box, extra large size, - - - - - - - 3.00 
1722, Life Box, with spiral open slot for obtaining close adjustment, - - 3.50 
1724, Maltwood Finder, in case, ------- - 4.00 
1726, Mechanical Finger, Dr. W. B. Rezners’s, ----- 6.00 
No. 1718. ROCHESTER, N. Y., AND NEW YORK CITY. 
67 
N«». 1 728. 
No. Price. 
.728, Mechanical Stage, - -- -- -- - $20.00 
.730, Mechanical Stage, graduated and silvered on edge with vernier and with silvered 
graduations for the rectangular movements, otherwise same as above, - 27.50 
No. 1732. 
1732, Mechanical Stage, as above, with vernier and with silvered graduations provided 
for the rectangular movements, ------ 40.00 
The advantages of mechanical stages for every variety of work, now generally 
conceded and particularly in original research, are as follows : The ability to 
systematically examine the entire surface of an object ; the easy manipulation 
of an object, especially with high powers ; the ability to count objects within a 
given space ; its use as a finder after repeated examinations Further than this 
there is nothing in their construction which would prevent their use as ordinary 
stages. The mechanical movements are entirely contained in the upper surface 
of the stage, and this being revolving, may be completely rotated on its axis. 
They are of the same thickness as our ordinary stages, and therefore offer no ob- 
struction to extreme oblique illumination. The movements are all extremely 
delicate. 
No. 1728 can be adapted to our microscopes, or any other instrument which will 
admit of a stage 3| in. diameter. The slide-carrier is provided with clips and 
stop for maltwood finder. 
No. 1732 is of more elaborate design and workmanship than the preceding one, 
and of larger size, its diameter being 4| in. It is intended to be used on our 
Professional Microscope. The rectangular movements are actuated by the two 
milled heads, placed one above the other. The slide-carrier is provided with clips 
and stop for maltwood finder on a hinge, so that it may be swung out of position. 
The stage is graduated to degrees and silvered. 68 
BAUSCH & LOMB OPTICAL COMPANY, 
No. Price. 
1734, Micrometer, Eyepiece, oblong, to fit slotted eyepieces, - - - $ 1.00 
1736, Micrometer, Eyepiece, disk fitted to any eyepiece, .... 1.50 
1738, Micrometer, Eyepiece, Jackson, with screw for adjusting, (can be fitted to Huy- 
ghenian eyepieces only), ....... 6.00 
1740, Micrometer, Filar, small size, adapted to any tube, - 32.00 
No. 1742. 
1742, Micrometer, Filar, large size, adapted to any tube, .... 45.00 
An internal frame is provided with a longitudinal, and transverse cross hair 
which is adjustable within a limited range for position, by a milled head at one 
end. The micrometer screw, which is cut either to one-half millimeter or one- 
fiftieth inch, is adjustable by graduated disk, and carries the cross hair across the 
field. The graduation is in 100 parts on a silver ring, and the reading is made from 
a stationary index. The graduated disk may be revolved on its axis. A comb is 
in the field corresponding exactly with the pitch of the screw, thus enabling the 
determination of the number of revolutions. A Ramsden eyepiece is used which 
is stationary in the optical axis but adjustable for focus. 
1744, Micrometer, Stage, and in., - - - - - - 125 
1746, Micrometer, Stage, and in., - - - - - 1.50 
1748, Micrometer, Stage, and mm., - ... 2.00 
1750, Micrometer, Stage, and mm., ...... 2.00 
1752, Micrometer, Stage, y >n- anc* ris and Tfftt mm., ... 4.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
69 
No. 1754. 
No. 1758. 
No. 1762. 
No. Price. 
1754, Nosepiece, double, brass finish, ------$ 5.00 
1756, Nosepiece, double, aluminum, ------ 6.75 
1758, Nosepiece, triple, brass finish, ------- 9.00 
1760, Nosepiece, triple, aluminum, ------ 11.00 
1762, Nosepiece, quadruple, brass finish, ------ 15.00 
1764, Nosepiece, quadruple, aluminum, ----- 18.00 
Since the introduction of our various nosepieces, they have become very popular 
and are now in general use. This is no doubt due to the perfection of their con- 
struction and practical adaptation in the first place, and then to the low price at 
which they are offered. The advantages of using two, three, or four objectives 
on an instrument, either of which can be used without the removal of one and 
attachment of the other, are so apparent that they need no argument. Further 
than this, when objectives are ordered with the apparatus, they are exactly 
centered, which is ordinarily not the case even in objectives of the same manu- 
facture. We also adjust objectives to correspond exactly in focus with a certain 
eyepiece, so that they require no adjustment except with the micrometer screw. 
On account of the work involved to obtain this convenience, we make an extra 
charge of $1.00 for each objective, except in pairs, No. 1028 and No. 1038, which 
are constructed with this object in view. 
1766, Paraboloid, for dark ground illumination, ----- 7.50 
1768, Paraboloid, same with adjustable stop, ----- 12.00 70 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 1770. 
No. Price. 
1770, Polariscope with 1 selenite in morocco case, . $12.00 
Analyzer in revolving mounting, extra, ----- 1.50 
No. 1772. 
1772, Polariscope, with large prisms, polarizer has 3 selenites mounted in a revolving 
disk, having one clear aperture, analyzer is arranged to revolve, in morocco 
case, - -- -- -- -- - 22.00 
1774, Polariscope with large prisms, polarizer is provided with 3 selenites mounted in 
revolving disk, analyzer is mounted in graduated disk, arranged to set over the 
neck of eyepiece and revolves thereon. Indicator is provided as well as cross 
hairs in eyepiece, ------- 32.50 
1776, Polariscope, with extra large prisms and 3 selenites, the analyzer is connected 
with goniometer and separate eyepiece, provided with cross hairs, - 40 00 
1778, Prism, Woodward, for extreme oblique illumination, - 1.25 
1780, Prism, Woodward, mounted with sub-stage fitting, - 5.50 
1782, Selenites, three colors, mounted on slide, ----- 5.00 
1784, Stage Forceps, fitted to stage, ------- 1.50 
No. 1786. 
1786, Stage Forceps, on slide, - - - - - - - - 2.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
71 
No. 17S8. 
No. 175)2. 
No' Price. 
1788, Stage Forceps, best, fitted to stage, - - - . . - $2 75 
1790, Stage Forceps, best, fitted to slide, - - - . . . 3 25 
1792, Stage Forceps, three-pronged, for holding minerals, etc., - - . 5.00 
No. 171)4. 
1794, Table, revolving, black walnut, adjustable for height, - - - 12.00 
1796, Wenham’s Half Button, - - - - - - - -2.00 
No. 1800. 
1798, Zoophyte Trough, small size, 0.60 
1800, Zoophyte Trough, with wedge and spring, - 2.50 72 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 1804. 
No. Price. 
1804, Sorby’s Spectroscope Eyepiece, for the microscope, in mahogany case, - $50.00 
1806, Abbe’s Spectroscope Eyepiece, for the microscope, in mahogany case, 
(Can supply No. 1806 to those entitled to duty free entry, at European prices.) ROCHESTER, N. Y., AND NEW YORK CITY. 
73 
APPARATUS FOR THE INVESTIGATION OF MICRO- 
ORGANISMS. 
No. Price. 
2800, Steam Sterilization Apparatus, as designed by Dr. R. Koch. Large size, felt 
covered, with stop-cock and gauge, ..... $22.00 
With thermometer, - - - - - 24.00 
Directions for using : Fill the apparatus with water to point indicated on gauge, 
place the helmet on, having previously inserted in it a thermometer ; apply heat, 
and when the thermometer has reached 100° C. (which will be indicated by escap- 
ing steam) then the material should be put in, but no sooner. The hooks on the 
side serve as supports for the material, or the latter is placed in the inner vessel. 
No. 2800. 
No. 2802. 
2802, Steam Sterilization Apparatus, for Blood Serum, with gauge, stop-cock and felt 
covering, - - - - - - - - 24.00 
Directions for using : Fill both cover and apparatus with water, being careful to 
keep the inner space perfectly dry. By means of two burners raise the temperature 
to 60° C., the blood serum contained in the sterilization glasses, which have been 
sterilized in apparatus No. 2806 is placed in the hollow space of the apparatus, the 
helmet placed on, and the inner temperature raised as quickly as possible to 58° C. 
(consequently it is not advisable to place too many tubes in at one time). The 
blood serum must remain perfectly liquid, therefore the temperature must not be 
raised above 60° C. 
2804, Apparatus for Solidifying Blood Serum, to take 50 or 100 tubes, the whole appar- 
atus covered with felt, having glass cover and movable legs. Large, - 24.00 
Directiotis for using: The blood serum 
having been sterilized in apparatus No. 
2802 is put in this apparatus (laying the 
tube in a slanting position) and heated 
from 65° to 75° C. The serum, as a result 
of this treatment, must become a trans- 
parent solid, therefore the heating has to 
be continued, and the tubes frequently 
examined, until this result has been 
attained. The small quantity of water 
which forms is allowed to remain, as it 
serves as Nutritive (Nahrboden). 
No. f. 804. 74 
BAUSCH & LOME OPTICAL COMPANY. 
No. Price. 
2806, Double Wall Sterilization Apparatus, for sterilizing at higher temperatures. 
Large size, with 3 shelves, iron rod and fork to support burner, hooks to fasten 
against the wall, and 4 legs to set on table, complete. Large, - - $30.00 
This apparatus is used to sterilize the vessels, intended to receive the matter to 
be worked with, viz : The receivers for the blood serum, Erlenmeyer’s flasks, 
glass plates for the nutritive gelatine supports, etc. The sterilization tubes, 
closed by a stopper of pure cotton, are placed in the galvanized frame (see No. 
2808), the frame is put into the apparatus and heated for one hour to 140 C. ; (the 
cotton will carbonize slightly). The glass plates for the water investigations are 
placed into the covered iron box (see No. 2810), and heated as above. 
The Erlenmeyer’s flasks closed with cotton stoppers, are heated directly in the 
apparatus to 140° C. 
No. 2800. 
No. 2812. 
No. 2808. 
No. 2810. 
2808, Basket of tinned metal for receiving the sterilization tubes, (as described in No 
2806), each, --------- 1.50 
2810, Metal Box to receive the glass plates to be sterilized, (see No, 2806), each, - 2.50 
10 glass plates to fit, - - - - - - - 1.00 
2812, Vegetation Apparatus of lead-lined metal, with glass and felt covering on legs, 
large size, complete, with water gauge and stop-cock, (Thermostat and Ther- 
mometer shown in cut, extra), ------ 36.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
75 
THE ARNOLD STEAM STERILIZER. 
This is the only inexpensive apparatus which maintains an unvarying tempera- 
ture of 100c C. (212 F.) in all parts of the sterilizing chamber, without needing 
any care or attention. For this reason they are rapidly displacing all other methods 
heretofore employed by prominent institutions throughout the country. They are 
also extensively used by physicians in their offices. 
No. 2820. 
No. 2836. 
Description : Water is poured into the pan or reservoir whence it passes slowly 
through three small apertures into the shallow copper vessel beneath, becomes 
converted into steam and rises through the funnel in the center to the sterilizing 
chamber above. Here it accumulates under moderate pressure at a temperature 
of 212° F. The excess of steam escapes about the cover, becomes imprisoned 
under the hood and serves to form a steam jacket between the wall of the sterili- 
zing chamber of the hood. As the steam is forced down from above and meets 
the air it condenses and drips back into the reservoir. 
No. Price. 
2820, Height, in. ; diameter, in. ; heavy tin, copper bottom, - - $2.50 
2822, The same, all copper, -------- 7.00 
2824, Height, 10| in. ; diameter, 9f in.; heavy tin, copper bottom, - - 8.00 
2826, The same, all copper, - - - - - - - -8.00 
2828, Height, 11| in.; diameter, 10|in.; heavy tin, copper bottom, - - 8.50 
2880, The same, all copper, -------- 9.00 
2832, Height, 12|Hn.; diameter, in.; heavy tin, copper bottom, - - 4,00 
2834, The same, all copper, - - - - - - - -10 00 
SPECIAL INSTRUMENT STERILIZER. 
Oval in shape. Size of chamber, 14 in. long, in. wide, 6 in. deep, with two 
racks for instruments. 
2836, Heavy tin, copper bottom, ------- 5.00 
2838, The same, all copper -------- 12.50 76 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 2840. 
No. 2842. 
No. Price. 
2840, Water Bath and Oven, with thermometer, ----- $12.50 
This convenient and really valuable addition to the armamentarium of the 
working microscopist, has won from those competent to judge its merits, many 
expressions of approval. Indeed, it is impossible to do good and fine work in 
mounting without such aid. To heat the bath and oven, it may be connected by 
means of rubber tubing, with a gas burner, or placed over a coal oil flame, the 
temperature being easily regulated by the thermometer. 
2842, Paraffine Bath, polished copper, tin lined, with nickel plated copper cups ; size 
3£ x 7 in., - -- -- -- -- 7.50 
No. 2850. 
No. 2852- 
2850, Hot Water Funnel, on legs, with rubber stopper and funnel made of heavy 
copper, --------- - 6.00 
2852, Thermostat (temperature regulator) after Prof. Reichert, - - - 3.00 
APPARATUS FOR NUMERATION OF BLOOD CORPUSCLES. 
2900, Haemacytometer (Dr. Gowers), in case, containing : Pipette for measuring the 
diluting solution ; Capillary tube for measuring the blood ; Cell with divisions 
on the floor mounted on a slide, to which springs are fixed to secure cover glass ; 
Vessel, in which the solution is made ; Spud for mixing the blood and solution ; 
Guarded spear, pointed needle, ------ 28.00 
2902, Haemaglobinometer (Dr. Gowers), in case, containing : Bottle with pippette 
stopper for holding the diluting solution ; capillary pipette for measuring the 
blood ; Graduated tube for measuring the amount of Haemaglobin ; Standard 
tint of normal blood ; Support for graduated tube and standard ; Puncturing 
needle, --------- 10.00 
2904, Both of the above in one case, ------ 37.50 
(Instruction circular accompanies each instrument.) ROCHESTER, N. Y., AND NEW YOKK CITY. 
77 
DISSECTING AND MOUNTING INSTRUMENTS. 
No. Price. 
3030, Collecting Bottles, round, number, 1 2 3 4 5 
each, $ .02 .03 .03 .04 .05 
dozen, .15 .20 25 .30 .40 
3002, Collecting Bottles, flat, number, 12 3 
each, $ .10 .12 .15 
dozen, 1.00 1 25 1.50 
3004, Glass Pipettes, funnel shaped top, straight, each, - - - - .05 
3006, Glass Pipettes, funnel shaped top, bent, each, ----- .05 
3008, Glass Pipettes, with rubber bulb, straight, each, - .05 
3010, Glass Pipettes, with rubber bulb, bent, each, ----- .05 
3012, Test Tubes, 
length, 3 in. 4 in. 5 in. 6 in. 7 in. 8 in. 9 in. 10 in. 11 in. 12. in. 
each, $ .03 .04 .05 .06 .07 .08 .12 .15 .20 .25 
dozen, .20 .30 .40 .50 .60 .80 1.20 1.50 2.00 2.50 
gross, 2.25 3.00 4.00 5.00 6.50 8.75 12.75 16.50 22.00 26.00 
3014, Test Tubes, nested, length, 4 to 6 in. 3 to 6 in. 3 to 7 in. 3 to 9 in. 
each, $ .10 .15 .20 .40 
dozen, 1.00 1.25 1.75 3.50 
3016, Bell Glasses, for preserving objects from dust during preparation. 
diameter, 3 in. 3J in. 4 in. 
each, - $.40 .50 .60 
3018, Petri Dishes, 4 in., each, ------- - .60 
3020, Glass Stirrers, with platinum wire fused in, - - - - - .50 
No. 3000. 
No. 3002. 
Nos. 3004. 
3010. 
3012. 78 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 3022. 
No. 3020. 
No. 3028. 
No. 3034. 
No. Price. 
3022, Capped Bottles, with triangular stopper, to prevent gumming, 1 oz. capacity, each, $ .35 
3024, Capped Bottles, with triangular stopper, to prevent gumming, 2 oz. capacity, each, .50 
3026, Dropping Bottles, with glass bulb, each, ..... .20 
3028, Dropping Bottles, with rubber top, each, ...... .25 
3030, Beaker Glasses, wide, with pour-out, 
Capacity. 1 oz. 2 oz. 3 oz. 4 oz. 6 oz. 8 oz. 10 oz. 
Size, 2x11 in. 2Jxlf 2fx2 2|x2| 3£x2| 3|x2f 
Each, $ .15 .15 .18 .18 .20 .20 .22 
Dozen, 1.60 1.60 1.75 1.80 2.00 2.10 2.20 
Capacity, 12 oz. 16 oz. 24 oz. 32 oz. 48 oz. 64 oz. 
Size, 4x3 in. 4|x3J 5x3f 6x4 6§x4§ 7|x4f 
Each, $ .25 .30 35 .45 .60 .80 
Dozen, 2.50 3.00 3.50 5.15 6.00 8.00 
3032, Beaker Glasses, wide, without pour-out, (same prices as No. 3030.) 
3034, Beaker Glasses, nested, wide. 
1, 2, 3, 4 and 6 oz., each, ------- - .75 
1, 2, 3, 4, 6 and 8 oz., each, - -- -- -- - 1.00 
1, 2, 3, 4, 6, 8, 10, 12 and 16 oz., each, ------ 1.75 
1, 2, 3, 4, 6, 8, 10, 12, 16, 24 and 32 oz., each, - - - - - 2 50 
1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 32 and 48 oz.. each, - - - 3.00 
• 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 32, 48 and 64 oz., each, - 3.75 
3036, Evaporating Dishes Glass, plain. 
Diameter, 2 in 3 in. 4 in. 5 in. 6 in. 
Each, $ .25 .30 .35 .40 .50 
Dozen, 2.00 2 50 3.00 3.50 4.50 
3038, Evaporating Dishes, Glass, plain, nested. 
Diameter, 2 to 4 in. 4 to 6 in. 2 to 6 in. 
Each, $ .75 1.00 1.25 
3040, Evaporating Dishes, Glass, with lips. 
Diameter, 2 in. 3 in. 4 in. 5 in. 6 in. 
Each, $ .45 .50 .60 .70 .80 
Dozen, 4.50 4.75 6.00 6.75 7.50 
3042, Evaporating Dishes, Glass, with lips, nested. 
Diameter, 2 to 4 in. 4 to 6 in. 2 to 6 in. 
Each, $1.25 1.75 2.50 ROCHESTER, N. Y., AND NEW YORK CITY. 
79 
No. 3050. 
No. Price. 
3044, Watch-Glasses, per dozen, - .40 
3046, Watch-Glasses, Syracuse solid : 
No. 1, Unground edges, each 10 cts.; in,set of six, - .50 
No. 2, Ground and polished edges, each 15 cts.; in set of six, - .75 
No. 3, Ground and polished edges and concaves, each, 50 cts.; in set of s-ix, 3.00 
The Syracuse solid watch glass rests solidly upon the table or microscope stage, 
and is not liable to be overturned and its contents spilled. In it on the microscope 
stage, can be examined from time to time, or dissected and studied, transparent 
tissues while in water, alcohol, oil of cloves or other bath. When the edges are 
cut and the top covered, specimens may remain for long staining or soaking, with- 
out becoming dirty and without loss of fluid by evaporation. 
We have secured the exclusive selling right for the American market. 
3048, Standard for the above, adapted for a nest of six or less, ... .50 
3050, Porcelain Saucers, 2| in. diameter, in nest of five, with cover, - - .60 
3052, Porcelain Saucers, 2| in. diameter, in nest of five, with cover, - - - .70 
3054, Porcelain Saucers, in. diameter, in nest of five, with cover, - - .80 
3056, Porcelain Saucers, 3f in. diameter, in nest of five, with cover, - - - 1.00 
3058, Porcelain Saucers, deep, 2f in. diameter, in nest of three, with cover, - 1.25 
3060, Porcelain Saucers, deep, 3|- in. diameter, in nest of three, with cover, - - 1.50 
3062, Porcelain Saucers, deep, 3f in. diameter, in nest of three, with cover, - 1.75 
No. 3048. 
No.?3046. 
No. 3064. 
3064, Injecting Syringe, | oz. capacity, lacquered brass, with fourcanulas and stop-cock, 
in case, - - - - - - - - - -8.00 
3066, Injecting Syringe, 1 oz capacity, lacquered brass, with four canulas and stop-cock, 
in case, - -- -- -- -- - 10.00 80 
BAUSCH & I.OMB OPTICAL COMPANY, 
No. 3074. 
No. 3070. 
No. 3072. 
No. Price. 
3068, Brass Table, with lamp for heating slides,, ..... $1.50 
3070, Mounting Stand, with lamp and separating sand bath, - - 2.00 
3072, Mounting Table, for the preparation tof mounted slides, ... ,80 
This mounting table was devised by J. M. Van Colt, Jr., adjunct Professor of 
Histology and Pathology at Long Island College Hospital, Brooklyn, N. Y. Its 
value lies in the greater facility it affords for the accurate preparation of mounted 
slides, and above all, the opportunity it gives for the study of stained sections in 
gross. The elevation of the section on the slide from the table admits of the greater 
certainty of its being thoroughly “cleared,” and also gives opportunity for the 
study of the localized action of differential stains. 
3074, Glass Spirit-Lamp, No. 1, with extinguisher, T\ in. burner, ... ,75 
3076, Glass Spirit-Lamp, No. 2. with extinguisher, J in. burner, ... .90 
3078, Glass Spirit-Lamp, No, 3, with extinguisher, in. burner, - - - 1.10 
No. 3080. 
3080, Cover-Glass Forceps, - - - - - - - - .60 
This forcep is a pattern suggested by Dr. J. H. Linsley and is a modification of 
a forcep for similar use generally employed in the German laboratories. The 
merits are these : It holds the cover-glass firmly without any danger of breaking 
it, the upper surface of the cover-glass is level and the forcep is laid upon its flat 
surface on the table. Its advantages for the purpose of staining preparations of 
Bacteria (Tubercle Bacillus, etc.,) is manifestly apparent. 
3082, Spring Compressors, nickeled, for holding down thin covers, per dozen, - .40 
3084, Spring Compressors, wood, for holding down thin covers, per dozen, - .25 ROCHESTER, N. Y., AND NEW YORK CITY. 
81 
No. Price. 
3086, Cover-Glass Gauge, ........ $3.00 
While the first purpose of this apparatus is to determine the thickness of cover-glass, it goes 
further in introducing a new system of cover-glass correction by means of the draw-tube. In 
devising it, the object has been to provide a mechanical means for obtaining the best optical 
results without any possibility of doubt, and it is conceded by prominent workers that it accom- 
plishes its purpose admirably. 
This instrument is provided with a stand of japanned iron, cut horizontally through the top 
is a thread in. pitch and T\ in. outside diameter. A recess is cut in the top below the line 
of the screw and at right angle to it, for placing the covers. The one-half of the top of the 
stand, which receives the micrometer screw, is slotted longitudinally to the depth of the screw, 
and is provided with a set-screw to take up wear ; the other half has the fixed screw, adjustable, 
however, for final adjustment. The end of the micrometer screw is milled, but Of a smaller 
diameter, so that no force can be exerted so as to endanger the cover-glass. Fixed on the screw, 
between two nuts, is a brass drum with a in. face. A knife-edge index finger is fixed to the 
top of the stand and projects over the top of the drum. 
To the outside diameter of the drum is fixed a strip of glazed paper provided with a series 
of divisions. The first gives the thickness of cover-glass in one thousandth inches, the second 
one-hundredth millimeter. The third indicates the proper tube length with various thickness 
of cover-glass with a non-adjustable \ corrected under a tube length of 8-| in. and cover thick- 
ness of 0.16 mm.; the fourth gives the tube length of a j in. objective under the same con- 
ditions ; the fifth for a and the sixth for a T‘? for same conditions of tube length and cover ; 
the seventh is for a with the same cover and tube length of 160.0 mm. 
In objectives provided with cover-correction, the graduation is so arranged as to read to 
1-100 mm. No matter what the power of objective or whether dry or water immersion, the 
number gives proper correction for a thickness corresponding to it. 
Its price has been reduced to a minimum, so as to put it in the power of every microscopist 
to have one in his possession. Jt should he found on the ■work-table of every one possessing a 
fnicroscope. 
COVER-GLASS GAUGE. 82 
RAUSCH & LOMB OPTICAL COMPANY, 
DISSECTING AND SECTION KNIVES. 
No. Price. 
3088, Dissecting Knives, ebony handles, each, - - - - - $ .05 
3090, Dissecting Scalpels, ebony handles, f in. cutting edge of blade, each, - .50 
3092, Dissecting Scalpels, ebony handles, lT*g in. cutting edge of blade, each, - .50 
3094, Dissecting Scalpels, ebony handles, 1J in. cutting edge of blade, each, - .50 
3096, Dissecting Scalpels, ebony handles, in. cutting edge of blade, each, - .50 
3098, Cartilage Knives, all steel, each, ...... .75. 
3100, Cartilage Knives, large, stout, ebony handles, each, .... 1.50 
3102, Cartilage Knives, extra large, stout, each, ..... 2.00 
3104, Brain Knives, each. - 2.00 
3106, Tenaculum, ebony handle, each, ...... .7$ 
No. 3088. 
NOS. 3096 
3094 
3092 
3090 
3108, Section Knives, ebony handles, in morocco case, each, - - - -3.2$ 
3110, Section Knives, ebony handles, large size, in morocco case, each, - - 5.00" 
Holding knife in right hand with concave side uppermost, and drawing towards 
the bodv, we consider right-handed. 
3112, Valentine Knives, for making thin sections of soft substances, each, - - 6.00 
3114, Fritsch’s Knives, for making thin sections of soft substances, each, - 6.00 
No. 3110. ROCHESTER, N. Y., AND NEW YORK CITY. 
83 
DISSECTING NEEDLES AND SCISSORS. 
Nos. 3116 
3118 
3120 
3122 
3124 
3126 
3128 
3130 
No. Price. 
3116, Dissecting Needles, ebony handles, round, each, - - - $ .40 
3118, Dissecting Needles, ebony handles, curved, each, .... ,45 
3120, Dissecting Needles, ebony handles, curved, blunt, each, ... .45 
3122, Dissecting Needles, ebony handles, spear pointed, each, ... .50 
3124, Dissecting Needles, ebony handles, triangular pointed, each, ... .50 
3126, Dissecting Needles, ebony handles, harpoon shaped, each, ... 1.00 
3128, Dissecting Needles, ebony handles, hook shaped, each, .... .75 
3130, Dissecting Needle Holder, with clamp and four needles, each, - - .20 
3132, Dissecting Scissors, ivory handle, with spring, ----- 6.00 
No. 3132. 84 
BAUSCH & LOMB OPTICAL COMPANY, 
DISSECTING SCISSORS AND FORCEPS. 
No. 3134. 
No. 313(5. 
No. 3138. 
No. 3158. 
No. 31(50. 
No. 3174. 
No. Price. 
3134, Scissors, Dissecting, very delicate, A\ in. long, straight, each, ... $1.00 
3136, Scissors, Dissecting, very delicate, in. long, bent, each, - - 1.25 
3138, Scissors, Dis>ecting. very delicate, 44 in. long, curved, each, ... 1.50 
3140, Scissors, Dissecting, delicate, 4 in. long, straight, each, ... .90 
3142, Scissors, Dissecting, delicate, 4 in. long, bent, each, - 1.00 
3144, Scissors, Dissecting, delicate, 4 in. long, curved, each, ... 1.25 
3146, Scissors, Dissecting, medium heavy, in long, straight, each, - - .75 
3148, Scissors, Dissecting, heavy, 5| long, straight, each, - - - 1.00 
3150, Scissors, Anatomical, 6f in. long, very heavy and extra large, each, - - 1.75 
3152, Forceps, Dissecting, brass, nickeled, 3 in. long, straight, each, - - .15 
3154, Forceps, Dissecting, steel, 3f in. long, straight, each, - .40 
3156, Forceps, Dissecting, steel, 3f in. long, curved, each, - - - .60 
3158, Forceps, Dissecting, steel, nickeled, very delicate, 4 in. long, straight, each, - 1.00 
3160, Forceps, Dissecting, steel, nickeled, very delicate, 4 in. long, curved, each, 1.25 
3162, Forceps, Dissecting, steel, nickeled, delicate, 4 in. long, straight, each, - .75 
3164, Forceps, Dissecting, steel, nickeled, delicate, 4 in. long, curved, each, - 1.00 
3166, Forceps, Dissecting, steel, nickeled, heavy, 4 in. long, each, ... .60 
3168, Forceps, Dissecting, steel, nickeled, heavy, 4f in. long, each, - - .75 
3170, Forceps, Dissecting, steel, nickeled, heavy, 5J in. long, each, ... 1.00 
3172, Forceps, Dissecting, steel, nickeled, very heavy, 5f in. long, each, - 1.50 
3174, Cover-Glass or Slide Forcep, steel, nickeled, 4 in. long, each, - 1.00 ROCHESTER, N. Y., ANI) NEW YORK CITY. 
85 
SECTION LIFTERS AND CAMEL’S HAIR PENCILS. 
Nos. 3178 
No. Price. 
3176, Section Lifters, brass, nickeled, single, f in. wide, each, - - $ .20 
3178, Section Lifters, brass, nickeled, (better finish), single, f in. wide, each, - .50 
3180, Section Lifters, brass, nickeled, ebony handles, double ended, 4 and f in wide, each, .60 
3182, Section Lifters, brass, nickeled, ebony handles, single, 4 in. wide, each, - .40 
3184, Section Lifters, brass, nickeled, ebony handles, single, in. wide, each, - .45 
3186, Section Lifters, brass, nickeled, ebony handles, single, £ in. wide, each, - .50 
3188, Section Lifters, brass, nickeled, ebony handles, single, 1J in. wide, each, - .60 
3190, Section Lifters, brass, nickeled, ebony handles, spoon, perforated, each, - 1.00 
3170 
3180 
3182 
3184 
3180 
3188 
31 90 
No. 3194. 
3192, Camel’s Hair Pencils, miniature, in quills, red silk and gold thread binding. 
Number 12345678 Assorted 
Length, No. 1 to 8. 
Each, $ .05 .06 .07 .08 .09 .10 .12 .15 .65 
Dozen, .50 .60 .70 .80 .90 1.00 1.25 1.50 
3194, Camel Hair Swan Quill Pencils, pointed, f, f- or 1 in. long, red silk and gold 
thread binding, each, - - - - - - - - .1 86 
BAUSCH * LOMB OPTICAL COMPANY, 
ANATOMICAL, BOTANICAL AND MICROSCOPICAL 
SETS OF DISSECTING INSTRUMENTS. 
No. Price. 
3200, Anatomical Set No. 1, Contains 
2 Scalpels, (No. 3092 and 3096); 1 Tenaculum, (No. 3106); 1 Cartilage Knife, 
(No. 3098); 1 Scissors, (No. 3146); 1 Forceps, (No. 3166); 1 Blow-Pipe and 1 Pair 
Chain Hooks, in cherry case, ------- $4.80 
3202, Anatomical Set No. 2, Contains 
3 Scalpels, (No. 3092 to 3096); 1 Tenaculum, (No. 3106); 1 Cartilage Knife, (No. 
3098); 1 Scissors, (No. 3146); 1 Forceps, (No. 3166); 1 Blow-Pipe and 1 Pair 
Chain Hooks, in cherry case, ------- 5.60 
3204, Anatomical Set No. 3, Contains, 
4 Scalpels, (No. 3090 to 3096); 1 Tenaculum, (No. 3106); 1 Cartilage Knife, 
(No. 3098); 2 Scissors, (No. 3146 and 3148); 1 Forceps, (No. 3166); 1 Blow-Pipe 
and 1 Pair Chain Hooks, in cherry case, ----- 6.75 
3206, Botanical Set No, 1, Contains 
1 Knife, (No. 3092); 1 Needle Holder and Needles, (No. 3130); 1 Forceps, (No. 
3154); 1 Scissors, (No. 3140); 1 Magnifier, (No. 112), in cherry case, - - 3 60 
3208, Botanical Set No. 2, Contains 
2 Knives, (No. 3092 and 3096); 1 Needle Holder and Needles, (No. 3130); 1 
Forceps, (No. 3154), 1 Forceps, (No.-3164); 1 Scissors,(No. 3140), 1 Scissors, 
(No. 3142); 1 Magnifier, (No. 112), in cherry case, - - - - 5.60 
3210, Microscopical Set No. 1, Contains 
1 Knife, (No. 3088); 1 Needle Holder and Needles, (No. 3130); 1 Scissors, 
(No. 3140); 1 Forceps, (No. 3154), in, cherry case, - 2.75 
3212, Microscopical Set No. 2, Contains 
3 Knives, (No. 3088); 1 Needle Holder and Needles, (No. 3130); 1 Scissors, 
(No. 3140), 1 Scissors, (No. 3142); 1 Forceps, (No. 3162), 1 Forceps, (No. 3164), 
in cherry case, - -- - - -- -- 6.00* ROCHESTER, N. Y., AND NEW YORK CITY. 
87 
RE-AGENT CASES. 
No. Price. 
■3220, Block of wood (bird’s-eye maple), polished, fitted for and with five re-agent bottles, 
No. 3026, labeled, and receptacles for cover-glass, glass slips and groove to 
receive dissecting instruments ; 1 oz. each of the following media, in separate 
bottles: Gentian Violet, Bismarck Brown, Absolute Alcohol, Turpentine and 3 
per cent, solution Nitric Acid in Alcohol. (Other media may be selected.) 
Each, $3.00 
No. 3220. 
No. 3222. 
3222, Re-Agent Case, of highly polished bird’s-eye maple wood, with cover and lock, 
containing five bottles, No. 3026, labeled, and arranged with receptacle for 
dissecting instruments. The same media as No. 3220 accompany this case. 
(Other media may be selected). Each, ------ 4.50 88 
BAUSCH & LOMB OPTICAL COMPANY, 
'No. Price. 
3224, Re-agent case of highly polished bird’s-eye maple, with cover and lock, containing 
15 bottles. No. 3026. labeled, and having groove provided for knives, scissors, 
forceps, etc. The following media (1 oz. of each in separate bottles) accompany 
each case : Gentian Violet, Bismarck Brown, Fuchsine, Aniline Blue, Eosine, 
0.3 per cent, solution, Nitric Acid in Alcohol, 0.3 per cent. Iodo-Iodide Potassa, 
0.5 per cent, solution Caustic Potassa, 0.3 per cent, solution Carbonate Potash, 
Phenolphtaline, Pot. Ferro-Cyanide, with 0.1 per cent. Acetic Acid, Absolute 
Alcohol, Turpentine, each, ------- $10.75 
No. 3224. 
No. 3244. 
3240, Turn-Table, “ National,” ------- 2.50 
3242, Turn-Table, same, with detachable hand-rests, .... 3.00 
3244, Turn-Table, “ National,” centering, - - - - - - 3 50 
The centering arrangement of this turn-table consists of three stops, against 
which the slide is placed and is held in position by the spring clips Although not 
strictly centering, it is approximately so on the usual slide, and, for all ordinary 
purposes, quite efficient. 
3246, Same, with detachable hand-rests, ------ 4.00 
3248, Turn-Table, self-centering with hand-rests. The advantage which this turn-table 
has over others, is, that glass slips of the various standard sizes used, can be... 
centered thereon, - -- -- -- - 6.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
89 
GLASS SLIPS. 
No. 
Per 
Dozen in 
Package. 
Per 
Gross 
in box. 
In io gross 
lots 
Per Gross. 
3400, Crown, 3 xl in., cut edges, extra white, - - - $ .12 $1.00 $ .80 
3402, Crown. 3 x 1 in., ground edges, rounded, extra white, - .15 1.75 1.35 
3404, Crown, 3x1 in., ground edges, square, extra white, - .14 1.40 1.15 
3406, Crown, 3 x 1 in., thin, ground edges, rounded, extra white, .20 2 00 1.60 
3408. Crown, 3 x 1 in., thin, ground edges, square, extra white. - .18 1.80 1.40 
3410, Crown, If x 1 in., ground edges, rounded, extra white, - .20 2.00 1.60 
3412, Crown, 2x1 in., ground edges, rounded, extra white, - .20 2.00 1.60 
3414, Crown, 3 x 2 in., ground edges, rounded, extra white, - .40 4.00 3.25 
3416, Crown. 5x4 in., cut edges, extra white, - - - .50 4.75 
3418, Crown, 5 x 4 in., ground edges, extra white, - - .75 7 50 
3420, Crown or Plate, 3x1 in., ground bevels, ... .40 400 
3422, Crown or Plate, 3x1 in., polished bevels, - - .50 5.00 
3424, Crown, 3 x 1 in., with ground edges and concave centres, 
extra white, - - - - - - 1.00 
THIN GLASS COVERS. 
Per 
Dozen. 
Per 
Ounce. 
In io oz.. 
lots. 
Each oz.. 
3440, In sheets, No. 1, T4ff to in. thick, - - - $1.00 
3442, In sheets, No. 2, to in. thick, - .65 
3444, In sheets, No. 3, to in. thick, - - - .50 
3446, In squares, No. 1, f, f, f or 1 in. diameter, - - $ .18 1.80 $1.60 
3448, In squares, No. 2, “ “ “ “ .16 1 40 1.20 
3450, In squares, No. 3, “ “ “ “ - .14 1 00 .80 
3452, In circles, No. 1, “ “ “ “ .20 2.25 2.00 
3454, In circles, No. 2, “ “ “ “ . ,18 1,80 1.60 
3456, In circles. No. 3, “ “ “ “ .16 1.40 1.20- 
3458, Oblong sizes, to in. thick, 10 x 15 mm., - - .20 
15 x 20 mm., - .20 
18 x 25 mm., - - .25 
18 x 27 mm., - .25 
20 x 25 mm., - - .25 
21 x 24 mm., - .25 
23 x 50 mm., ' - - .45 
24 x 32 mm., - .40 
26 x 34 mm., - - .40 
30 x 40 mm., - .45 
40 x 50 mm., - - .50 
50 x 60 mm., - .75 
1 40 
LABELS AND COVERS FOR SLIDES. 
3470, Adhesive Labels, white, round or oval, per 100 in box, ... .10' 
3472, Adhesive Labels, white, square with black border, per 100 in box, - .15 
3474, Adhesive Labels, square with fancy border,assorted colors, per 100 in box, .25 
3476, Adhesive Labels, same as No. 3474, with imprint of two lines on each label, per 
1000 uncut, -------- - 2.00 
3478, Adhesive Labels, gilt fronts, for covering slides, per 100, - .25 
3480, Adhesive Labels, backs, per 100, ------ .25 
Backs and Fronts, if with holes punched, per 100, extra, - .15 
Special net quotations in extra large quantities 90 
BAUSCH & LOMB OPTICAL COMPANY. 
MOUNTING AND STAINING MEDIA. 
Oz. 
Pottle 
Solution. 
Pint 
Pottle 
Solution 
Dry 
per OZ. 
No. 
3500, Xylol, pure, ------$ .20 $1.50 
3502, Absolute Alcohol, Dr. Squibb’s, - .20 1.50 
3504 Benzole, pure, ------ .20 1.00 
3506, Canaria Balsam, paper filtered, in flexible tubes, - - .25 2.75 .30 
3508, Canada Balsam, in benzole, - .50 4.25 
3510, Canada Balsam, in chloroform, .... .50 5.00 
3512, Canada Balsam, in Xylol, • - - - - .50 5.00 
3514, I )amar, in benzole, ...... .50 3.50 
3516, Deane's Medium, ------ .35 
3518, Farrant’s Medium, ...... .50 
3520, Glycerine, pure, ...... .25 1.00 per lb. 
3522, Glycerine, camphorated, for delicate vegetable tissues, - .25 
3524, Glycerine, jelly, ------ .50 
3526, Oil of Cloves, ------- .35 4 00 per lb. 
3528, Asphaltum, ------- .25 2.00 per pint. 
3530, Asphaltum, quick drying, - .35 
3532, Turpentine, ------- .25 .60 
3534, Brown’s Transparent Rubber Cement, ... .35 
3536, Brunswick Black, ------ .25 2.00 
3538, Gold Size, .25 2.00 
3540, Hollis’ Glue, ------ .30 
3542, King’s Amber Cement, transparent, with directions, - .25 
3544, King’s White Cement, transparent, with directions, - .25 
3546, King’s Lacquer Cell and Finish, scarlet, with directions, - .50 
3548, King’s Lacquer Cell and Finish, blue, with directions, - .50 
3550, Marine Glue, hard, melting point 250° F., box, - - .35 
3552, Marine Glue, fluid, ------ .35 
3554, Marine Glue, colorless, ----- .40 
3556, White Zinc Cement, ----- .50 
3558, Ammonia, Carmine, Beale’s, ----- .25 2.00 
3560, Borax, Carmine, ...... .25 2.00 
3562, Piero, Carmine, ------ .25 oz. .75 
3564, Aniline, blue, ------ 20 2.00 .50 
3566, Aniline, green, ------ .20 2.00 .40 
3568, Aniline, red, .20 2.00 .35 
3570, Aniline, violet, - - - - - - - .20 2.00 .60 
3572, Methyl, blue, - .20 2.00 1.00 
3574, Methyl, violet, - - - - - - - .20 2.00 1.00 
3576, Methyl, green, ------ .20 2.00 .50 
3578, Eosine, - - - - - - .20 2 00 .50 
3580, Haematoxylin, ------ .20 2.00 oz. .75 
3582, Sulpho-Indigotate Soda, ----- .20 2.00 | oz. .75 
3584, Burril’s Stain for Bacillus Tuberculosis, with directions, - .35 
3586, Gentian Violet, ------- .20 2.00 .60 
3588, Bismarck Brown, ------ .20 2.00 .30 
3590, Osmic Acid, g oz. or 1 gramme, - - - - 2 00 
3592, Carmine Injecting Gelatine, Dr Seiler’s, - - 1.00 
3594, Aniline Oil, pure, for use in preparation of Bacillus Tuberculosis, .20 2.50 
3596, Paraffine, pure, soft, melting point 109° F., pound, - .50 
3598, Paraffine pure, hard, melting point 129° F., pound, - - .50 
3600, Celloidine, 1 oz. box, ----- 1.25 
3602, Cedar Oil, for microscopic purposes, - .50 
3604, Dr. Gibbes Double Stain for Bacillus Tuberculosis, - .50 
3606, Fuchsine, ------- .25 .50 
3608, Saffranine, ------- .25 .40 
3610, Vesuvin, ------- .25 .40 
3612, Nitric Acid in Alcohol, 3 per cent. Solution, - - .25 
3614, Iodo-Iodide Potassa, 0.3 per cent. Solution, - .25 
3616, Caustic Potassa, 0.5 per cent. Solution, - .25 
3618, Carbonate of Potash, 0.3 per cent. Solution, - - - .25 
3620, Phenolphtaline, ------ .25 
3622, Pot. Ferro-Cyanide, with 0.1 per cent. Acetic Acid, - - .25 
These media we guarantee to be of the quality best suited for microscopical purposes and 
are put up in the neatest possible manner ; each bottle is plainly labeled and enclosed in paper 
■cartoon. 
Special net quotations in extra large quantities. ROCHESTER, N. Y„ AND NEW YORK CITY. 
91 
CELLS. 
No. Price. 
3640, Glass cells, various sizes and depths, per dozen, - - - . $1 00 
3642, Rubber cells, various sizes and depths, per dozen, ... .15 
3644, Block tin cells, various sizes and depths, per dozen, .... .20 
3646, Zylonite cells, various sizes and depths, transparent, per dozen, - .25 
No. 3050. 
3650, Atwood Rubber Cells, for mounting opaque objects, per dozen, - - .30 
These cells are made by us They are exceedingly neat, require but little time 
in mounting, and have the advantage that objects can be mounted and preserved 
independent of the slip. They are made for one-half in. covers. 
BOXES AND CABINETS FOR OBJECTS. 
A. 
No. 3(>(>0. 
B. 
3660, Mailing Cases, Bradley’s, per dozen tops, ..... .06 
Mailing Cases, Bradley’s, per dozen bottoms, - .06 
Mailing Cases, Bradley’s, per dozen centers, - .06 
The new mailing case here illustrated is designed to supply a demand for some 
safe and cheap means of packing one or more microscope slides for mailing. The 
entire device comprises three differently shaped pieces of wood so formed that 
two, three or more may be put together, as shown in the cut, figure A. For one 
slide two pieces are used, for two slides three pieces, and so on to any convenient 
number. 
The cross section, figure B, shows the relation of the parts of the case to the 
slide. The pinching of the wooden lips on the margin of the glass, outside the 
mounting, serves to hold the slide securely in place, and to protect the mounting 
from possible injury. The three pieces are designated as tops, bottoms and 
centers. 
3662, Mailing Boxes, wood, to hold 3 objects, 3 x 1 in., per dozen, - $ .80, each, $ .07 
3664, Mailing Boxes, wood, to hold 6 objects, 3 x 1 in., per dozen, - .85, each, .08 
3666, Mailing Boxes, wood, to hold 12 objects, 3 x 1 in., per dozen, - .90, each, .09 
3668, Mailing Boxes, wood, to hold 25 objects, 3x1 in., per dozen, - 1.00, each, .10 
3670, Mailing Boxes, wood, to hold 12 objects, If x 1 in., per dozen, - .90, each, .09 
3672, Mailing Boxes, wood, to hold 25 objects, If x 1 in., per dozen, - 1.00, each, .10 
3674, Mailing Boxes, wood, to hold 50 objects, If x 1 in., per dozen, - 1.50, each, .15 
3676, Mailing Boxes, wood, to hold 25 objects, 3 x 2 in., per dozen, - 2.00, each, .20 
3678, Cloth covered slide box, with lid and sliding cover and numbered index to hold, 
25 objects, 3x1 in., ------- each, .35 92 
BAUSCH & LOMB OPTICAL COMPANY, 
CABINETS. 
No. 3604. 
No. 3700. 
No. Price. 
3680, Cabinet, portable, white wood, 4 trays, holding ‘24 objects, - - $1 00 
3682, Cabinet, portable, white wood, 6 trays, holding 36 objects, - - 1 50 
3684, Cabinet, p >rtabie, white wood, 8 trays, holding 48 objects, - - 1.75 
3686. Cabinet, portable, white wood, 10 trays, holding 60 objects, . - 2 00 , 
3688, Cabinet, portable, white wood, 12 trays, holding 72 objects, - - 2.50 
3690, Cabinet, portable, white wood, 12 trays, holding 144 objects, - - 3.50 
3692, Cabinet, portable, mahogany, 6 trays, holding 36 objects, - - 2.00 
3694, Cabinet, portable, mahogany, 12 trays, holding 72 objects, - - 3.25 
3696, Cabin t, portable, mahogany, 12 trays, holding 144 objects, - - 5.00 
3698, Cabinet, portable, Pillsbury’s, containing 10 boxes for 250 slides. - 3.00 
3700, Cabinet, portable, Pillsbury’s, containing 20 boxes for 500 slides, 4 00' 
The Pillsbury Cabinet consists of a finely polished cherry case, containing ten 
or twenty boxes, grooved on the inside, to receive twenty-five slides each, and 
provided w th a lock. When the boxes are in place in the cabinet, the slides lie 
horizontally, thus avoiding all liability of damage to slides in top. 
The top of each box as placed in the cabinet, is provided with an index, and on 
the bottom of the box. inside, is a corresponding number to show the proper 
location of each slide. If a cabinet is not required the boxes may be used singly, 
as a simple rubber band serves to hold the cover securely in place. They are of 
plain white-wood, neatly finished. (See No. 3668.) 
3702, Cabinets, mahogany, solid door, for 500 objects, .... 35 00- 
3704, Cabine s. mahogany, solid door, for 750 objects, - - - 45 00 
3700, Cabinets, mahogany, solid door, for 1000 objects, .... 55.00 
3708, Cabinets, mahogany, glass panel door, for 500 objects, - - 40.00 
3710. Cabinets, mahogany, glass panel door, for 750 objects, - - - 50.00 
3712, Cabinets, mahogany, glass panel door, for 1000 objects, - - 70.00- 
Objects in all above cabinets lie flat. In cabinets Nos. 3702 to 3712 the knobs 
are numbered, and porcelain tablets are inlaid into the fronts of the drawers, they 
are made to order only. ROCHESTER, N. Y., AND NEW YORK CITY. 
93 
IMPROVED PHOTO-MICROGRAPHIC GAMERA. 
SMALL SIZE. 
The camera portion of this apparatus is in general construction the same as 
the large size described on page 05, except that the size is x 5| in., and that 
the front is so arranged that a 4 x 5 plate in kit can be adjusted directly to the 
same, which in the case of the large size, using x in. plate would require 
the use of the plate holder. Kits x 4-4 and 4x5 accompany this outfit. 
The microscope attachment is simple ; the tube to receive objective is fastened 
directly to the front board, and is arranged with draw-tube to receive eyepiece 
if such is required to be used. The coarse adjustment is effected by sliding the 
stage of mirror-bar upon a solid base and is focused at any point by a screw with 
pin. The fine adj istment is contained in the base plate, and is acted upon by a 
micrometer screw at the back and the connecting rod as shown. 
The camera bellows when drawn out have an extension of 2 feet 6 in. 
Microscope attachment the same as No. 3764 can also be applied to this camera. 
No. Price. 
3750, Improved Photo-Micro Camera, small size, (no microscope attachment), - $30.00 
3752, Improved Photo-Micro Camera, as described above and as shown in cut, - - 42.00 
3754, Improved Photo-Micro Camera, with microscope attachment, same as No. 3764, 65.00 
New rectangular tube with prism, can be fitted to any microscope or camera, 
extra, --------- 10.00 
Fitting other microscopes than our own to camera, extra, according to the 
amount of work involved, ------- 
Revolving stage, with removable spring clips, extra, - 5.00 
Glass stage with slide carrier, which slips over either plain or revolving stages, 
extra, --------- - 5.00 
Mechanical stage No. 1728, in place of the regular, extra, - - 18,00 
Graduated mirror bar, with mirror and sub-stage (both adjustable), same as 
used on Investigator, in place of one accompanying stand, extra, - 5.00 
Abbe Condenser, 1.20 N. A., in mounting No. 1678, extra, - - 14.00 
Abbe Condenser, 1.42 N. A., in mounting No. 1678, extra, 7. 16.00 
Abbe Condenser, Achromatic, 1.0 N. A,, in mounting No. 1678, extra, 26.00 94 
BA use H & LOMB OPTICAL COMPANY,- 
No. 3752. 
No. 5)704. ROCHESTER, N. Y., AND NEW YORK CITY. 
95 
IMPROVED PHOTO-MICROGRAPHIC CAMERA. 
LARGE SIZE. 
This camera is designed for photo-micrographic, copying, enlarging and 
reducing work. The camera sections are made of mahogany highly finished, 
bellows of rubber and well made. The camera slides on V shaped ways ; the 
sections have clamps, thus allowing each to be fastened at any point upon the 
bed and insuring extreme firmness. The center section is arranged to receive 
front board for rectilinear lens. The front of the camera has adjustment in 
two directions (rising and falling front and side movements) ; plate-holder can 
either be used in the front or the back of the camera, as the case may require.. 
The ground glass is removable and cover glass is cemented to the matted 
surface of the same to allow of more delicate focusing. Alongside of the bed 
the focusing rod is attached, which is separable at the junction of the two 
sections of the bed ; by means of a clamping screw the connection of the rod 
can easily be made. 
The size of plate is 6|- x in. Kits x tj, 4x5 and x 5| accompany 
the outfit. The plate-holder is single and reversible. 
The microscope attachment consists of our Model stand (see description 
page 21) having draw-tube, thus giving short and long standard of tube length 
in cases were eyepieces are used. A valuable feature in connection with the 
microscope is our new rectangular tube carrying a prism in mounting, which 
is attached to the nosepiece. By raising or lowering the latter, the prism is. 
brought in or out of the field of the image circle. In the case of the former the 
object is plainly visible in the eyepiece, and may be centered at will and light 
adjusted, by withdrawing the tube all light is excluded and the object can be 
focused on the ground glass of the camera. The microscope is fastened to the- 
bed by cleats and thumb-screw, and is easily removable when the attachment, 
is not required. The camera bellows when drawn out have an extension of 
3 feet 6 in. 
Microscope attachment as No. 3752 can also be applied to this camera. 
No. Price.. 
3760, Improved Photo-Micro Camera, large size, (no microscope attachment), - $40.00 
3762, Improved Photo-Micro Camera, with microscope attachment, same as No. 3752. 52.00* 
3764, Improved Photo-Micro Camera, with microscope attachment as described above, 
and shown in cut, including Continental eyepiece (any power), - - 75.00 
New Rectangular Tube with prism, can be fitted to any microscope or camera, 
extra, --------- 10.00 
Fitting other microscopes than our own to camera, extra, according to the amount 
of work involved, - -- -- -- - 
Revolving stage, with removable spring clips, extra, ... 5.00 
Glass stage with slide carrier, which slips over either plain or revolving stagae, 
extra, ---------- 5.00 
Mechanical stage No. 1728, in place of the regular, extra, - - 18.00 
Graduated mirror bar, with mirror and sub-stage (both adjustable), same as used 
on Investigator, in place of one accompanying stand, extra, - - 5.00- 
Abbe Condenser, 1.20 N. A., in mounting, No. 1678, extra, - - 14.00 
Abbe Condenser, 1.42 N. A., in mounting, No. 1678, extra, - 16.00- 
Abbe Condenser, Achromatic, 1.0 N. A , in mounting No. 1678, extra, - 26.00 96 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 8770. ROCHESTER, N. Y., AND NEW YORK CITY. 
97 
THE PROFESSIONAL PHOTO-MICRO CAMERA. 
This instrument has been designed by Mr. George W. Rafter, with special 
reference to doing photo-micrographic work of a high character with the greatest 
possible economy of time. It is provided with a number of new and important 
features, which enable work to be done with the utmost facility and certainty. 
The work which has been done on this instrument is of the highest order, and is 
in the greatest rpeasure owing to the perfection of the instrument, and to the 
new features involved. 
The base of the instrument consists of a wooden frame in which are inlaid 
two racks. On one side of the base is a graduation in feet, tenths and hundreds 
of a foot, which forms a record of the positions of the screen for producing given 
magnifications. The length of the frame may be extended to eight feet by the 
addition of supplementary frame, which are easily attached and automatically 
form connection of the adjusting rod. The bellows rest and slide upon the 
frame, and the ground glass is adjusted by pinions. The bellows are made in 
sections and may thus be extended to the length of the bed. The plate holder 
is for x plate, but so arranged that smaller plates may be used. The fine 
adjustment is effected by a micrometer screw, which is acted upon by the adjust- 
ing rod, and works with promptness with any amplification. The stage is round 
and provided with spring clips, and may be fastened at any point upon the bed 
for approximate focus. The sub-stage bar has adjustable sub-stage and swings 
to any obliquity on a center in line with the stage. 
The tubes rest upon two brass supports and are connected with the tapering 
front of the camera. The main tube is provided with two inner tubes, the smaller 
of which is graduated and intended to carry the amplifier, or when desired, an 
eye-piece. Both tubes are adjusted by means of a rack and pinion, and arranged 
with pulley for cord. The main tube has at its posterior end a rectangular tube 
provided with draw-tube, eyepiece with cross hairs, and rectangular prism by 
which the image may be viewed and centered upon the ground glass. At the 
front is a similar rectangular tube intended for use with high powers. 
The new features which we claim make it the efficient instrument it is, are : 
1. The application of specific appliances for moving the amplifier, in order 
to find by trial, for any given extension of the camera, the best position of the 
amplifier. 
2. The application of two horizontal prism-tubes, one for use with high 
powers and the amplifier, and the other for use with low powers without the 
amplifier. 
а. The cross wires in the eyepieces for centering. 
4. The making of bellows in sections to admit of their ready extension or 
removal 
5. The making of the base in sections in connection with the coupling focus- 
sing rod. 
б. The plate holder, which admits of all sizes of plates up to 6J x in. 
7. The ability to use an eyepiece in place of the amplifier. 
To those interested in the subject, we will send a pamphlet giving complete 
description on application. 
-3770, Professional Photo-Micro Camera, with tapering bellows and one section with 
ground glass, posterior and anterior rectangular tubes, one frame section, 
complete adjustments, one x 8-| plate holder, one achromatic amplifier, $125.00 
One additional sectional Bellows and Frame extra, - 15.00 
Mechanical stage No. 1728, with grooved pulleys for cords in place of plain stage, 
extra, - -- . - - - - - 20.00 
Plane and Concave Mirror with Attachments, extra, - - - 4.00 
Apparatus for instantaneous exposures, extra, - 35.00 
Sub-stage, with rack and pinion, extra, ----- 15.00 
Abbe Condenser, 1.20 N. A., in mounting No. 1678, extra, - - 14.00 
“ “ 1.42 N. A.. “ 16.00 
“ Achromatic, 1.0 N. A., in mounting No. 1678, extra, 26.00 98 
BAUSCH & LOMB OPTICAL COMPANY, 
PLANO OR DOUBLE CONVEX AND CONCAVE LENSES. 
BEST QUALITY. 
Ground 
edges 
(not ceiitered.) 
Perfectly 
centered. 
3850, in. diameter. £ in. focus, -----$ .65 .$ .90 
3852, £ in. diameter, \ in. to Ts5 in. focus, - .65 .90 
3854, Yg in. diameter, f in. to T5? in. focus, - .65 .90 
3856, £ in. diameter, £ in. to f in. focus, - .75 1.00 
3858, f in. diameter, £ in. to £ in. focus, - .75 1 00 
3860, £ in. diameter, 1 in. to § in. focus, - .75 1.00 
3862, § in. diameter, 1£ in. to £ in. focus, - .85 1.10 
3864, £ in. diameter, in. to 1 in. focus, - .85 1.10 
3866, 1 in. diameter, 2 in. to 1£ in. focus, - - - .85 1.10 
3868, 1£ in. diameter, 5 in. to 72 in. focus, - .50 .85 
3870, 2 in. diameter, 6 in. to 72 in. focus, - .60 .95 
3872, 3 in. diameter, 6 in. to 72 in. focus, - .75 1.25 
3874, 4 in. diameter, 12 in. to 72 in. focus, - 1.25 1.75 
3876, 5 in. diameter, 18 in. to 72 in. focus, - 1.75 2.25 
3878, 6 in. diameter, 24 in. to 72 in. focus, - - - 2.50 3.00 
3880, 7 in. diameter, 30 in. to 72 in. focus, ... 3.00 3.75 
3882, 8 in. diameter, 30 in. to 72 in. focus, - - - 4 00 4.75 
No. 
DEMONSTRATION LENSES. 
No. Price. 
3890, Demonstration Lenses. A set of six 1£ in. diameter, showing the forms of the 
various kinds of lenses, viz: Double convex, double concave, piano convex, 
piano concave, Meniscus convex and Meniscus concave, in box, - - 1.60 
3892, Demonstration Lenses. A set of ten, 1£ in. diameter, as above, in addition one 
lens each, cylindrical convex, cylindrical concave, spherical-cylindrical and 
prismatic, in box, - -- -- -- - 2.40 
CONDENSING LENSES-PLANO CONVEX, GROUND EDGES. 
3900, in. diameter, unmounted, - - - - - - - 150 
3902, in. diameter, unmounted, ------- 1.75 
3904, 3 in. diameter, unmounted, - - - - - - - 2.00 
3906, in. diameter, unmounted, ------- 2.25 
3908, 4 in. diameter, unmounted, ------- 2.50 
3910, 4| in. diameter, unmounted, ------- 3.00 
3912, 5 in. diameter, unmounted, ------- 3.75 
3914, 6 in. diameter, unmounted, ------- 6.00 
3916, 7 in. diameter, unmounted, ------- 10.00 
3918, 8 in. diameter, unmounted, ------- 15.00 
3920, 9 in. diameter, unmounted, ------- 20.00 
3922, 10 in. diameter, unmounted, - - - - - . - - 25.00 
3924, in. diameter, one pair, mounted in brass cell, - 7.00 
3926, 4 in. diameter, one pair, mounted in brass cell, - 8.00 
3928, in. diameter, one pair, mounted in brass cell, - 10.00 
3930, 5 in. diameter, one pair, mounted in brass cell, - 11.50 
3932, 6 in. diameter, one pair, mounted in brass cell, - 17.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
99 
CALCSPAR, QUARTZ, SELENITE AND MICA PREPARATIONS. 
GUARANTEED OF THE BEST QUALITY. 
No. Price. 
3940, 6 mm., opening angle 31° 16', each, ------ $1.50 
3942, 7 mm , opening angle 31° 16, each, - 1.75 
3944, 8 mm., opening angle 31° 16', each, ------ 2.00 
3946, 9 mm., opening angle 31° 16', each, - 2.50 
3948, 10 mm., opening angle 31° 16', each, ------ 3.25 
3950, 11 mm., opening angle 31° 16’, each, ----- 3 75 
3952, 12 mm., opening angle 31° 16', each, ------ 4 50 
3954, 13 mm., opening angle 31° 16', each, ----- 5.50 
3956, 14 mm., opening angle 31° 16', each, 6.50 
NICOL’S PRISMS, DIAGONAL FACE. 
NICOL’S PRISMS, SQUARE FACE, WIDE FIELD. 
8958, 6 mm., opening angle 31° 16', each, ------ 1.75 
3960, 7 mm., opening angle 31° 16 , each, - 2.00 
3962, 8 mm., opening angle 31° 16’, each, ------ 2.50 
3964, 9 mm., opening angle 31° 16', each, ----- 3.00 
3966, 10 mm.. opening angle 31° 16', each, ------ 3.75 
3968, 11 mm , opening angle 31° 16', each. ----- 4.50 
3970, 12 mm., opening angle 31° 16', each, ------ 5.00 
3972, 13 mm., opening angle 31° 16', each, ----- 6.00 
3974, 14 mm., opening angle 31° 16’, each, ------ 7.00 
3976, Quartz Wedge Compensator mounted on glass plate, 55 x 14 mm., each, 6.00 
3978, Quartz Wedge, 12 mm. wide, 32 mm. long, colors 1 to 3 order, - - 6.00 
3980, Quartz Wedge, 12 mm. wide, 32 mm. long, colors 3 to 5 order, - - 6.00 
3982, Quartz Wedge, 12 mm. wide, 32 mm. long, colors 1 to 6 order, - - 6.00 
3984, Quartz Wedge, 12 mm. wide, 45 mm. long, colors 1 to 3 order, - - 8.00 
3986, Quartz Wedge, 12 mm. wide, 45 mm. long, colors 3 to 5 order, • - - 6.00 
3988, Quartz Wedge, 12 mm. wide, 45 mm. long, colors 1 to 4 order, - - 6.00 
3978 to 3988 are made to order only.) 
3990, Quartz Plate, Bertrand’s quadrant, 24 mm. diameter, mounted, each, - 10.00 
3992, Gypsum Plate, red of the first order, 12 mm. diameter, unmounted, each, 2.00 
3994, Bertrand’s Lens, for magnifying the interference figure, mounted, - 2.50 
3996, Selenite films, 18 mm. diameter, unmounted, red and green, - - - 1.50 
3998, Selenite films, 18 mm. diameter, unmounted, blue and yellow, - - 1.50 
4000, Selenite films, 18 mm. diameter, unmounted, purple and green, - - 1.50 
4002, Quarter Undulation mica plate, 12 mm. diameter, unmounted, - - 2.00 100 
BAUSCH & LOMB OPTICAL COMPANY, 
TELESCOPE OBJECTIVES, GUARANTEED OF FINEST 
QUALITY. 
No. Price 
4010, 1 in. diameter, 5f in. focus, mounted in cell, - $5.00 
4012, 1T\ in. diameter, 7 in. focus, mounted in cell, - 5.50 
4014. 1* in diameter, 8 in. focus, mounted in cell, - 5.50 
4016, 1 f in. diameter, Ilf in. focus, mounted in c .11, - 6.50 
4018, 1 f in. diameter, 14| in. focus, mounted in cell, - 6.50 
402d, 1 f in. diameter, 16| in. focus, mounted in cell, - 6.50 
4022, 1 in. diameter, 20 in. focus, mounted in cell, - 9.00 
4024, 2 in. diameter, 24 in. focus, mounted in cell, - - - 12.00 
4026, 2 f in. diameter, 30 in. focus, mounted in cell, - - - - 25 00 
4028, 8 in. diameter, 42 in. focus, mounted in cell, ... 40.00 
4030, 3 \ in. diameter, 48 in. focus, mounted in cell, - 70.00 
4032, 4 in diameter, 60 in. focus, mounted in cell, - 90.00 
All of the above objectives of 14 in. and larger diameter we make to order, and 
are of a quality which will equal the best extant. The foci for the different sizes 
are in our opinion the most desirable, but may be changed according to the wish 
of the purchaser. 
ACCESSORIES FOR TELESCOPES. 
4040, Celestial Eyepieces, Huyghenian, any power. .... 4,00 
4042, Celestial Eyepieces, Periscopic, any power, - 10.00 
4044, Celestial Eyepieces, Solid, any power, ------ 6.00 
4046, Comet Eyepieces, Periscopic, large field, ----- 15.00 
4048, Terrestrial Eyepieces, - - - - - - - - 7.50 
4050, Ramsden Positive Eyepieces, ------ 4.00 
4052, Diagonal Eyepieces, - -- -- -- - 15.00 
4054, Sun-shade, fitted to either of the above, ----- 1.00 
4056, Sun-shade, wedge shape, giving intermediate tints between light and very dark, 4.50 
4058, Finder, with objective lTsff in. diameter, with cap, in lacquered tube, with draw- 
tube and egypiece with cross-wires, - - - - - - 16.00 
4060, Same as 4058, with the addition of centering standards, - 20.00 
We also make to order tubes with and without rack and pinion adjustment 
suitable for any size objectives ; also portable and fixed equatorial mountings in 
iron or brass, which are adapted to objectives up to 6 in. aperture. They are 
from new patterns of exceedingly neat design. It will give us pleasure to furnish 
estimates on application. 
RECTANGULAR PRISMS-CROWN GLASS. 
4670, f in. square, face 90,- - - - - - - - 2.00 
4072, £ in. square, face 90 , - - - - - - - 2.50 
4074, f in. square, face 90', -------- 3.00 
4076, 1 in. square, face 90°, ------- 4.00 
4078, If in. square, face 90% - -- -- -- - 5.00 
4080, If in. square, face 90 , ------- 6.50 
4082, If in. square, face 90% - -- -- -- - 8.50 
4084, 2 in. square, face 90% ....... 11.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
101 
ACHROMATIC TRIPLETS AND CODDINGTON 
MAGNIFIERS. 
No. 345. 
No. 380. 
No. Price. 
340, Coddington Magnifier, | in. focus, in German silver mounting, - - $2.00 
345, Coddington Magnifier, f in. focus, in German silver mounting, - - 2.00 
350, Coddington Magnifier, 1 in. focus, in German silver mounting, - - 2.00 
355, Coddington Magnifier, 2 in. focus, in German silver mounting, - - 2.00 
360, Doublet Magnifier, new construction, giving large and flat field, - - 4.00 
370, Achromatic Triplet, \ in. focus, in German silver mounting, - - 6.00 
375, Achromatic Triplet, f in. focus, in German silver mounting, - - 6.00 
380, Achromatic Triplet, 1 in. focus, in German silver mounting, - - 6.00 
The above Coddington Magnifiers are of the best possible construction, and 
are made with great care throughout. Although the size of the field is limited, 
it is flat and the definition excellent. 
The Achromatic Triplets are, as their name implies, thoroughly achromatic 
systems composed of one crown and two flint glass lenses cemented together. 
The image given by them is the nearest approach to that given by the compound 
microscope, and for preliminary examinations where powers up to twenty diameters 
are required, will well take the place of low-power objectives. They give a very 
large and flat field, have great depth of focus, and give perfect definition even 
when the optical axis is held at great obliquity. 102 
BAUSCH <fe LOMB OPTICAL COMPANY, 
MAGNIFIERS. 
No. 50. 
No. 51. 
No. Price. 
50, Rubber Case, size of glass, f in. diameter, $ .30 
56, Rubber Case, same as No 50, size of glass, 1 in. diameter, - - .40 
62, Rubber Case, same as No. 50, size of glass, If in. diameter, - .60 
68, Rubber Case, same as No. 50, size of glass, 1£ in. diameter, - - .70 
74, Rubber Case, same as No. 50, size of glass, If in. diameter, - - - .90 
78, Rubber Case, same as No. 50, size of glass, 2 in. diameter, - - 1.15 
51, Rubber Case, size of glasses, f and f in. diameter, - .60 
57, Rubber Case, same as No. 51, size of glasses, £ and 1 in. diameter, - .80 
63, Rubber Case, same as No. 51, size of glasses, 1£ and If in. diameter, - 1.00 
69, Rubber Case, same as No. 51, size of glasses, If and 1£ in. diameter, - 1.25 
75, Rubber Case, same as No. 51, size of glasses, 1£ and If in. diameter, - 1.65 
79, Rubber Case, same as No. 51. size of glasses, If and 2 in. diameter, - 2.15 
No. 101. 
No. 102. 
No. 103. 
101, Rubber Case, size of glass, f in. diameter, - - - $ .40 
110, Rubber Case, same as 101, size of glass, f in. diameter, ... .50 
119, Rubber Case, same as 101, size of glass, 1 in. diameter, - .60 
102, Rubber Case, size of glasses, f and f in. diameter, - .60 
111, Rubber Case, same as 102, size of glasses, f and £ in. diameter - - .75 
120, Rubber Case, same as 102, size of glasses, f and 1 in. diameter, - 1.00 
106, Rubber Case, size of glasses, £, f and f in. diameter, - - .80 
112, Rubber Case, same as 103, size of glasses, f, f and £ in. diameter, - 1.00 
121, Rubber Case, same as 103, size of glasses, f, £ and 1 in. diameter, - - 1.30 ROCHESTER, N. Y., AND NEW YORK CITY. 
103 
MAGNIFIERS. 
No. Price. 
56 A, Aluminum Case, (shape and size of No. 56), -----$ .60 
101 A, Aluminum Case, (shape and size of No. 101), .... .60 
110 A, Aluminum Case, (shape and size of No. 110), .... .75 
102 A, Aluminum Case, (shape and size of No. 102), - .90 
111 A, Aluminum Case, (shape and size of No. Ill), .... 1.10 
No. 128. 
128, Rubber Case, with diaphragm ; single lens, ..... .50 
129, Rubber Case, with diaphragm, size of No. 128 ; two lenses, - - .75 
130, Rubber Case, with diaphragm, size of No. 128; three lenses, - - 1.25 
No. 143. 
141, Linen-Prover, Brass, with 1 in. open square, ..... 1.75 
142, Linen-Prover, Brass, with £ x | in. open square, ... - .50 
148, Linen-Prover, Brass, with J in. open square, ..... .50 
143|, Linen-Prover, Brass, with round openings, .... .50 
No. 144. 
No. 144 A. 
No. 144*. 
144, Watchmaker Glasses, assorted (three sizes and different focus), each, - .40 
144J, Watchmaker Glass, one lens, strong focus, .... ,40 
144A, Watchmaker Glass, with two lenses, giving two powers, .... .75 
144 L. P., Watchmaker Glasses, with springs, (three sizes and different focus), each, .60 104 
BAUSCH & LOMB OPTICAL COMPANY, 
No. 14(5. 
No. Price. 
145, Engraver Glass, with double plano-convex lenses, If in. diameter, - $2.00 
146, Engraver Glass, with double plano-convex lenses, If in. diameter, - 2.50 
147, Engraver Glass, with double plano-convex lenses, If in. diameter, - 3.00 
148, j) Engraver Glass, with double plano-convex lenses. 2f in. diameter, - 3.75 
145A, Engraver Glass, with single double-convex lens, If in. diameter, - - .75 
146A, Engraver Glass, with single double-convex lens, If in. diameter, - 1.10 
147A, Engraver Glass, with single double-convex lens, If in. diameter. - - 1.50 
148A, Engraver Glass, with single double-convex lens, 2f in. diameter, - 1.90 
Xo. 252. 
Black enameled 
wood handle. 
Ivory Zvlonite 
handle 
No. Price. No. rrice. 
Metal Frame, size of glass, 2 in. diameter, - - 252, $ .80 270, $1 20 
Metal Frame, size of glass, 2\ in. diameter, - - 253, .90 271, 1.30 
Metal Frame, size of glass, 2f in. diameter, - - 254, 1.00 272, 1.40 
Metal Frame, size of glass, 2| in. diameter, - - 255, 1.25 273, 1.75 
Metal Frame, size of glass, 3 in. diameter, - - 256, 1.50 274, 2.00 
Metal Frame, size of glass, 3f in. diameter, - - 257, 1.75 275, 2.35 
Metal Frame, size of glass, 3f in. diameter, - - 258, 2.00 276, 2 75 
Metal Frame, size of glass, 3f in. diameter, - - 259, 2.25 277, 3.00 
Metal Frame, size of glass, 4 in. diameter, - - 260, 2.50 278, 3.25 
Metal Frame, size of glass, 4f in. diameter, - - 261, 3.25 279, 4.00 
Metal Frame, size of glass, 5 in. diameter, - - 262, 4.00 280, 5.00 
Metal Frame, size of glass, 5f in. diameter, - - 263, 5.00 281, 6 00 
Metal Frame, size of glass, 6 in. diameter, - - 264, 6.00 282, 7.00 ROCHESTER, N. Y., AND NEW YORK CITY. 
105 
R. Classified foists ©f 
Fipsl-Slass Mi(iP©S(i©pe 0bje<3lS. 
In revising this list and classifying the Subjects and studies represented, 
we have been guided altogether by the demand of the past years, and only 
enumerate such preparations as are most generally called for by the busy 
microscopist who has not the time to prepare them himself. We have made 
arrangements with reliable and, in their line of study, representative parties 
to prepare these objects for us, and we offer only the very best obtainable 
in quality and finish of mount. It shall be our endeavor to carry the stock 
as complete as possible, and thus avoid all vexatious delays in the filling of 
orders. It will give us pleasure to send out a reasonable number of objects 
for examination and selection to any person known to us, giving good 
references, with the understanding that he bear the cost of transportation 
and loss of breakage. 
We preface the Educational Series with remarks, to which we beg to 
call your attention. In many instances these preparations will fill all need 
fully as well for demonstration purposes as some of the best quality, and 
we can recommend them to give good satisfaction. 
Where so stated, we will put up sets of preparations according to the 
number given, in a neatly finished wooden case with trays, and in such cases 
will leave the selection entirely to the purchaser. All subjects classified are 
considered typical slides in their respective series. 106 
BAUSCH & LOMB OPTICAL COMPANY. 
No. 4500. Each, 75 cents ; per dozen, $7.50 ; set of 24 in case with trays, $15.00. 
HISTOLOGICAL SERIES. 
Aorta, Normal, Human. 
Bladder, Human. 
Bone, Adult, Longitudinal, 
“ “ Transverse. 
“ Developing. 
Brain, Cerebellum, Normal, Human. 
“ Cerebrum, 
“ Medulla, 
Cartilage, Elastic. 
Hyaline. 
Compound Lymphatic Gland. 
Crystalline Lens, Human, showing ultimate 
fibre. 
Endothelimn. 
Epithelium, Columinal. 
Squamous. 
Finger-Nail. 
Heart, Normal, Human. 
Ileum, Human. 
Intestine, Injected, Cat. 
“ Normal, Human. 
Kidney, Injected, Human. 
“ Normal, “ 
Liver, Bile Ducts, Injected. 
“ Normal, Human. 
Lung, 
Mammary Gland, Normal, Human. 
Membrane, Mucous. 
“ Serous. 
Muscle, Striated. 
Muscle, Unstriated. 
Nerve Cells. 
Nerve Fibres. 
Nerve, T. S. Normal, Human. 
Oesophagus. 
Optic Nerve, Trans. Sect. 
Ovary, Normal, Human. 
Pancreas, “ 
Pigment Cells. 
Scalp, Human, Caucasian. 
“ Negro. 
Skin, Human, African. 
“ “ Caucasian. 
Spinal Cord, Trans. Sec., Normal, Human. 
“ “ Long. Sec., “ 
Spleen. 
Stomach. 
Supra-Renal Body, Normal Human. 
Tendon Cut, Transverse. 
“ “ (Teased). 
Testicle, Normal, Human. 
Thyroid Lymphatic Gland. 
Tissue, Adipose. 
“ Adult, Connective, 
“ Embryonal, Connetive. 
“ Growing, 
“ Yellow, Elastic. 
Tooth, Longitudinal. 
“ Transverse. 
Uterus, Normal, Human. 
No. 4502. Each, 75 cents ; per dozen, $7.50 ; set of 24 in case with trays, $15.00. 
PATHOLOGICAL SERIES. 
Brain, Cerebrum, General Paralysis. 
“ Softening. 
“ Medulla Oblongata, Locomotor Ataxia. 
“ Pons Varolii, Diabetes. 
Heart, Fatty Degeneration. 
“ Fatty Infiltration. 
Intestine, Enlarged Peyers Patch. 
“ Tubercular. 
Kidney, Acute Catarrhal Nephritis. 
“ Amyloid. 
“ Chronic, Bright’s Disease. 
“ Chronic Catarrhal Nephritis. 
** Interstital Nephritis. 
Liver, Amyloid Degeneration. 
“ Carcinoma. 
“ Cirrhosis. 
“ Fatty Degeneration. 
“ Infiltration. 
Lung, Acute Catarrhal Pneumonia. 
Lung, Acute Miliary Tuberculosis. 
“ Catarrhal Pneumonia and Tuberculosis. 
“ Croupous Pneumonia, 1st stage. 
“ “ “ 2nd stage. 
“ “ “ 3rd stage. 
“ Fibroid Phthisis. 
“ Haemorrhagic Infarction. 
“ Solitary Tubercle. 
“ Nailer’s Consumption. 
Muscle, Trichinous. 
Skin, Lupus Vulgaris. 
“ Scarlet Fever. 
Spinal Cord, General Paralysis. 
“ “ Hydrophobia. 
Spleen, Amyloid. 
“ Leukaemia. 
Thyroid Glands, Colloid Degeneration . 
Tongue, Epithelioma. 
Tonsil, Hypertrophy. ROCHESTER, N. Y., AND NEW YORK CITY. 
107 
TUMOR SERIES. 
No. 4504. Each 75 cents ; per dozen, $7.50 ; in set of 24 in wooden case, $15.00. 
Adenoma, Breast. 
“ Cystic, Ovary. 
Carcinoma, Encephaloid, Breast. 
Endothelial. “ 
“ Scirrhus, “ 
Chondroma, Testicle. 
Epithelioma, Cylindrical, Rectum. 
“ Squamous, Lip. 
Fibroma, hard, Palm of hand. 
“ soft, Back of Neck. 
Glioma, Cerebrum. 
Myoma, Leio., Uterus. 
Myoma, Rhabdo., Kidney. 
Neuroma, Thigh after Amputation. 
Osteoma, Left Frontal Region. 
Papilloma, hard, Face. 
“ soft, Bladder. 
Sarcoma, Giant Cell, Head of Humerus. 
“ Large Spindle Cell, Elbow. 
“ Melanotic, Eye. 
“ Osteo, Knee Joint. 
“ Small Round Alveolar, Neck. 
“ Small Round Cell, Arm. 
“ Small Spindle Cell, Jaw. 
BACTERIOLOGICAL SERIES. 
No. 4506. Each, 85 cents ; per dozen, $9.00 : set of 24 in case with trays, $18.00. 
Anthrax, Bacillus. 
“ Blood of Guinea-Pig(Gram’s method). 
“ Colonies. 
“ Liver, (section). 
“ Spleen, “ 
“ Threads and Spores. 
Bacillus Anthracis in Kidney. 
“ of Chicken Cholera. 
“ of Glanders. 
“ of Green Pus. 
“ of Hog Erysipelas. 
“ of Malignant Oldema. 
“ of Swine-Plague (Am.) 
“ of Symptomatic Anthrax. 
“ of Tetanus. 
“ Leprosy in Ear. 
Leprosy in Skin. 
“ Tuberculosis. 
“ Tuberculosis in Human Lung, (sec.) 
Bacillus Tuberculosis from Lung Cavity. 
“ Tuberculosis, Pure Culture. 
in Sputum. 
Comma Bacillus. 
Comma Bacillus with Flagella. 
Deneke’s Bacillus. 
Eberth’s Bacillus of Typhoid Fever. 
Emmerich’s Bacillus. 
Finkler-Prior’s Bacillus. 
Fraenkel’s Pneumococcus. 
Friedlander’s Pneumobacillus. 
Gonococcus. 
Loffler’s Diphtheria Bacillus. 
Micrococcus Tetragenus. 
Prudden’s Diphtheria Streptococcus. 
Spirilla and Vibriones. 
Staphylococcus pyog. Aureus. 
Streptococcus Erysipelatis. 
Vibrio Metschinkoff. 
BLOOD, SPERMATOZOA 
AND URINARY DEPOSITS. 
Blood Disks— 
Frog. 
Dove. 
Human. 
Turtle. 
Spermatozoa— 
Dog. 
Fish. 
Horse. 
Man. 
Urinary Deposits— 
Amorphous Phosphates. 
Amorphous Urates. 
No. 4508. Each, 60 cents ; per dozen, $6.00. 
Urinary Deposits— 
Chloride of Sodium. 
Carbonate of Lime. 
Cystine. 
Epithelium. 
Glucose. 
Leusine. 
Mucus. 
Murexide. 
Nitrate of Urea. 
Oil Globules. 
Oxalate of Lime, Dum-bell. 
Oxalate of Lime, Octahedral. 
Urinary Deposits. 
Phosphate of Lime. 
Phosphate of Calcium 
Phosphate of Soda. 
Pus. 
Sugar in Diabetes. 
Triple Phosphate. 
Tube Casts. 
Tyrosine. 
Urate of Ammonia. 
Urate of Soda. 
Urea. 
Uric Acid. 108 
BAUSCH & LOMB 
OPTICAL COMPANY, 
PARASITIC INSECTS. 
No. 4510. Each, 50 cents ; per dozen., $5.00. 
Bed-Bug, Cimex lectularius, Male. 
“ Female. 
Body Louse, Pediculus vestimenti. 
Crab Louse, Pediculus pubis, Male. 
“ “ Female. 
Face Insect, Demodex folliculoruro. 
Flea of Cat, Pulex felis. 
Flea of Dog, Pulex canis. 
Flea of Man, Pulex irritans, Male. 
Flea of Man, Pulex irritans, Female. 
Head Louse, Pediculus capitis, Male. 
“ Female. 
“ “ Egg. 
Itch Insect, Sarcoptes scabiei, $1.00. 
“ “ “ “ Male, Female 
and Larva, ($2 50). 
Itch, Insect, Sarcoptes scabiei, Male, Female,. 
Male, Female, Egg and Larva, ($3.00). 
Parasite of Bee. 
Sheep Thick, Melophagus ovinus. 
No. 4512. Each, 50 cents ; per dozen, $5.00. 
PARTS OF INSECTS. 
Antennae, Blow Fly. 
Eggs, Butterfly. 
Eyes, Beetle. 
“ Green Head Fly. 
“ House Fly. 
Foot, Green Head Fly. 
“ Water Beetle. 
Gizzard, Cockroach. 
“ Cricket. 
Head, Blow Fly. 
“ Mosquito, Male, (showing Antennae). 
Female, (showing Lancets). 
Lancets, Green Head Fly. 
Leg and Foot, Blow Fly. 
“ “ “ Honey Bee. 
“ “ “ Spider. 
Mouth Parts, Honey Bee. 
Proboscis, Blow Fly, (75 cents). 
Bumble Bee. 
Proboscis, Honey Bee. 
“ House Fly. 
Scales, Butterfly. 
“ Mosquito. 
“ Lipisma saccharina, (60 cents). 
“ Podura Plumbea, (75 cents). 
Spinnerets, Spider. 
Spiracle, Blow Fly. 
“ Cricket. 
“ Tomato Worm. 
Sting, Bumble Bee. 
“ Honey Bee. 
Trachea. Potato Bug, showing hairs. 
“ Water Beetle. 
Wing, Bee, showing hooklets. 
“ Butterfly, 
“ Honey Bee. 
“ Mosquito. 
SECTIONS OF AMERICAN WOODS. 
No. 4514. Each, 60 cents ; per dozen, $6.00. 
Apple, Pyrus Malus. 
Ash, Fraxinus Americana. 
Asp, Populus tremuloides. 
Balm of Gilead, Populus Balsamifera. 
Basswood, Tilia Americana. 
Bay, Magnolia glauca. 
Beech, Fagus ferrugniea. 
Birch, Betula, papyracea. 
Box, Buxus, sempervirens. 
Buckwheat Tree, Cliftonia ligustrina. 
Cedar, Torreya taxifolia. 
Cherry, Prunus Pennsylvanica. 
Chestnut, Castanea vesca. 
Cottonwood, Populus monolifera. 
Cucumber Tree, Magnolia acuminata. 
Cypress, Taxodium distichum. 
Dogwood, Cornus florida. 
Elder, Negundo aceroides. 
Elm, Ulmus Americana. 
Fir, Abies Balsamea. 
Hickory, Carya alba. 
Holly, Ilex Opaca. 
Ironwood, Carpinus Caroliniana. 
Laurel, Magnolia Grandiflora. 
Lime, Nyssa Capitata, 
Linden, Tilia Europaea. 
Locust, Robinia Pseudacacia. 
Maple, Acer saccharinum, 
Oak, Quercus alba. 
Persimmon, Diospyros Virginiana. 
Pine, Pinus resinosa. 
Poplar, Populus alba. 
Sassafras, Sassafras officinale. 
Spruce, Abies nigra. 
Sycamore, Platanus occidentalis. 
Tamarack, Larix Americana. 
Walnut, Juglans nigra. 
Willow, Salix alba. ROCHESTER, N. Y., AND NEW YORK CITY. 
109 
VEGETABLE KINGDOM. 
No. 4516. In two Series of 24 preparations each, illustrating the structure of the higher order 
of plants. Each, 60 cents ; set of 24 in case with trays, $12.00. 
Series I on structure, illustrating plant anatomy. This shows the most 
important features of plant structure, from the simple cell and its contents, 
to the most elaborate tissue formations. The student starts with the cell, 
studies its structure and contents, then takes up cell aggregates or tissues, and 
finally tissue systems. The arrangement being according to Prof. Bessey’s 
Botanies. The practical studies given in his books have been followed where 
possible, so as to make the set fit the text and work there given. The “mounts” 
have been prepared to show some special feature plainly and correctly, but 
at the same time care has been taken to make the “ mounts ” comprehensive, 
so that each one is valuable for a number of practical studies, at the same 
time showing the relation of the various tissues and tissue systems to each 
other in the plant body. 
THE CELL AND ITS PRODUCTS. 
1. Protoplasm and nucleus, stained, show- 
ing chromation threads, Long. sec. of 
Pine Cone. 
2. Cell-Walls. Black rust spores of wheat. 
(See also 4.) 
8. Cell-formation by budding. Ferment of 
Wine (yeast) stained. 
4. Chlorophyll. Leaf of Moss. 
5. Starch and Aleurone in cross section of 
Pea. Stained. 
6. Crystals of Cactus fruit (aggregate) and 
prisms in scale of Onion bulb. 
TISSUES. 
7 Parenchyma (soft tissue), sunflower pith. 
8. Collenchyma (thick angled), cross section 
of stem of white water lilly. 
9. Sclerenchyma (stony tissue, long, and 
cross section of hickory-nut shell.) 
10. Fibrous tissue, cross and long, section of 
maple, showing bast and wood, (stained). 
11. Laticiferous (milk tissue), Euphorbia. 
12. Sieve tissue, cross and long, section of 
squash stem. 
TRACHEARY. 
13. Spiral ringed, etc., in longitudinal section 
of Impattens sp. 
14. Scalariform vessels, cross and long, sec- 
tion of Pteris aquilena (underground 
stem). 
15. Pitted vessels Nicotinna glaucer. (See 
also 16 and 12.) 
16. Tracheids in Douglas Spruce. 
PRIMARY MERISTEM. 
17. Growing point ; long, section from tip of 
corn root. 
SYSTEMS OF TISSUES—EPIDERMAL. 
18. Epidermis of “ Liveforever ” leaf; top 
view showing stomata and cells, also 
cross section showing guard cells of 
stomata. 
19. Epidermis of Fiens elastica, showing 
thickened epidermal walls and stomata 
in cross section. Many of these sections 
show fine cystoliths. 
20. Hairs, various kinds on one slide. 
FI PRC VASCULAR SYSTEM. 
21. Bundle of corn, cross and long, section. 
22. Bundle of “ground-pine,” Lycopodium 
dendroideum. 
INTERCELLULAR SPACES. 
28. Star-shaped cells and spaces, cross section 
yellow pond lily. (See also 8). 
24. Turpentine canals in leaf of pine. 
*The fundamental system may be studied from 1, 2, 7, 8 and others, 110 
BAUSCH & LOMB OPTICAL COMPANY, 
VEGETABLE KINGDOM—Continued. 
Series II illustrating “The Vegetable Kingdom.” Starts with the lowest 
plants and shows typical representatives of the various classes throughout the 
Kingdom. Great care has been taken to make each specimen complete. 
BASIDIOMYCETES. 
16. Cross section of gills of Ayaricus sp. 
showing spores, etc. 
HEPATICAE. 
17. Marchantia polymorpha. 
MUSCI. 
18. A moss showing leaves and fruit. 
EQUISETINAE. 
19. Equisetum arvense, long, section of 
cone. 
FILICINAE. 
20. Prothallium of fern. 
21. Sori of fern. 
LYCOPODINAE. 
22. Selaginella sp. 
GYMNOSPERMAE. 
23. Pine cones, male and female, long. 
section. 
ANGIOSPERMAE. 
24. Long, section of flower and fruit of sun- 
flower. 
CYANOPHYCF.AE. 
1. C'scillaria. 
2. Bacteria. 
CHLOROPHYCEAE. 
3. Protococcus viridis. 
4. Desmids. 
5. Spirogyra sp. 
6. Rhizopus nigricaus. 
7. Euteromorpha intestinallis. 
8. Vaucheria sessilis. 
9. Peronospora parasitica. 
PHAEOPHYCEAE. 
10. Lauimaria, (cross secticn). 
11. Fucus vesiculosis, (cross section). 
FLORIDEAE. 
12. Coleochaete sp. 
13. Ectocarpus littorales, (red sea-weed). 
CHARACEAE. 
14. Chara, in fruit. 
ASCOMYCETES. 
15. Lichen, vertical section of fruit of Physcia 
stellaris. 
MINERAL SERIES. 
No. 4518. Each, $1.00 ; set of 15 in box, $14 50. 
Selected preparations constituting a small set of typical mineral slides. 
Serift Granite (Graphic Granite). 
Melitite Basalt. 
Noseau Phenolite. 
Eustalite diabase. 
Harzburgite. 
Hypersthene Anderite. 
Pitchstone. 
Uralite Porphyrite. 
Perlite. 
Syenite. 
Andalusite Schist. 
Ottrelite Schist. 
Cyanite granulite. 
Cordierite Gneiss. 
Topaz Tourmaline rock. 
Mounted on glass slips 45 x 26 mm. 
We can also supply the complete “Standard Collections ” as recommended by 
Prof. C. Klein and H. Rosenbusch, upon import order, however, only. These 
comprise : 
4520, 1st Collection—115 thin sections of the most important petrographical minerals, 
mounted on glass slips 45 x 26 mm. 
4522, 2nd Collection—314 thin sections of igneous rocks, mounted on glass slips 
45 x 26 mm. 
To institutions of learning and others entitled to “ duty free importation,” we 
can furnish the above at European prices, which we will quote upon request. ROCHESTER, N. Y AND NEW YORK CITY. 
111 
CHEMICAL SERIES. 
No. 4524. Each, 50 cenis ; per dozen, $5,50. 
Aloin. 
Boracic Acid. 
Bromine (Bromide of lead). 
Caffeine. 
Carbonate of Cerium. 
Chronium (Potassium Chromate). 
Hydrastine. 
Iodide of Lead. 
Iodide of Mercury. 
Manganese (Potassium Permanganate.) 
Molybdate of Ammonium. 
Hippuric Acid. 
Nitrate of Nickel. 
Nitrate of Strontium. 
Oxalate of Calcium. 
Oxide of Arsenic. 
Phosphate of Magnesium. 
Silver (Reduced). 
Sulphate of Atropia. 
Sulphate of Chinchonidia. 
Sulphate of Iron. 
Sulphate of Lithium. 
Sulphate of Morphia. 
Sulphate of Quinia. 
Sulphate of Quinidia. 
Sulphate of Strychnia. 
Sulphate of Zinc. 
Sulphide of Tin. 
Sulphur. 
Tartrate of Antimony. 
PREPARATIONS SPECIALLY SELECTED FOR USE WITH THE 
POLARISCOPE. 
Borate of Sodium. 
Chloride of Barium. 
Chloride of,Cobalt. 
Eikonogen. 
Ethyl Gallate. 
Hydroquinone. 
Kinate of Quinia. 
Murexide (Dichromatic). 
Phenacitin. 
Pyro-Gallic Acid. 
No. 4526. Each, 50 cents ; per dozen $5.50. 
Pyrogallol. 
Quinidine. 
Salicin. 
Saccharine (Benzoic sulfinine). 
Santonin. 
Sulphate of Brucia. 
Sulphate of Cadmium. 
Sulphate of Codia. 
Sulphate of Copper. 
Triple Phosphate. 
Nt>. Price. 
4528, Worms— 
Ascarides and Ova from Child, ..... Each, $ .75 
Cysticerous, vesiculosus, ..... “ .75 
Eels from Vinegar, ....... “ .75 
Hydatid from Liver of Man. ..... “ .75 
Oxyuris vermicularis (human entozoon), .... “ .75 
Tape-worm, - - - - - - - “ .75 
Trichina spiralis, Encysted, ------ “ .75 
“ “ Free, ------ “ .75 
4530, Mollusca— 
Bugula avicularia, ------- “ .60 
Embryo oysters, in fluid moving, .... “ 1.00 
Garden Snail, ------- “ .60 
4532, Radiata— 
Brittle Star Fish, ------- “ .60 
Campanularia, ------- “ .60 
Holothuria, - -- -- -- - “ .60 
Section of Coral, ------ “ .60 
Spines, - -- -- -- - “ .60 
Synapta, ------- - “ .60 
MISCELLANEOUS. 112 
BAUSCH & LOMB OPTICAL COMPANY, 
4534, Protozoa— 
Sponge, -------- .60 
Spiculae, -------- “ .60 
Foraminifera, ------- - “ .60 
Polycystina, - -- -- -- “ .60 
4536, Vegetable Kingdom— 
Frond of Fern, - -- -- -- “ .60 
Spores of Fern, - - “ .60 
Corn Smnt, - - - - - - - - “ .60 
Mould, mucor mucedo, ------ “ .60 
Potato Mould, - -- -- -- “ .60 
Red Rust, - - - -- -- “ .60 
Smut in Ear and Grain of Wheat, - - - - - “ .60 
Spores of Yeast Plant, - - - - - - “ .60 
Volvox Glotator, - - - - - - - “ .60 
Edible Earth from Java, ----- “ .50 
Sea Soundings, Atlantic Ocean, ----- “ .50 
Sea Soundings, Indian Ocean, ----- “ .50 
M I S C E L.L ANEOU S.—Continued. 
TEST OBJECTS 
DIATOMS, DRY OR IN STYRAX. 
Amphipleura Pellucida. 
Frustulia, saxonica, 
Grammathophora Marina. 
“ Subtilisima. 
Navicula Rhomboides. 
Nitzschia Sigmoides. 
Pleurosigma, Angulatum. 
Acuminatum. 
“ Balticum. 
Elongatum. 
Fasciola. 
Surirella Gemma. 
No. 4538. Each, 60 cents ; per dozen, $6.00. 
MISCELLANEOUS. 
Hair of American Bat. 
Hair of Indian Bat. 
Foot of Water Beetle. 
Proboscis of Blow Fly (75 cents). 
Scales of Lipisma saccharina. 
“ of Podura Plumbea. 
“ of Hipparchia Janira. 
“ of Morpho-Menelaus. 
Hair of Dermestes, larva. 
Hair of Indian Mouse. 
Pygidium, Flea. 
No. Price. 
4540, Opaque or transparent, about 10 specimens, ----- $1.50 
4542, “ “ “ 25 . - - - 3.00 
4544, “ “ “ 40 . . - - . 4 50 
4546, “ “ “ 55 - - - - 6 00 
4548, “ “ “ 70 7.50 
4550, Diatomaceen Probe Platte, 20 diatoms arranged in line according to their value 
as test objects, in case with printed list. 
Prepared in Styrax, - - - - - - - 6 00 
“ Dry, - - - 7.50 
4552, Diatomaceen Probe Platte, 60 diatoms arranged in line according to their value 
as test objects, in case with printed list. 
Prepared in Styrax, - -- -- -- - 10.00 
“ Dry, - 12,00 
4554, Diatomaceen Typen Platte, systematically arranged, prepared in balsam with 
name of diatoms photographed beneath it, in case with printed catalogue. 
100 diatoms, - -- -- ... 13.00 
Styrax has been substituted for balsam, as objects mounted in it are better 
preserved, It has also a higher refractive index. 
MOELLER’S ARRANGED DIATOMS. ROCHESTER, N. Y., AND NEW YORK CITY. 
113 
ARTIFICIAL MICROSCOPIC OBJECTS. 
No. 4556. Micro-Photographs. Each, 50 cents ; per dozen, $5.00. 
Address to Light, by Milton. 
A Glimpse at an English Homestead. 
Apollo and Daphne. 
A Portrait badly paid for. 
Apostrophe to the Ocean, Byron. 
“ Bab Ballads”, Captain Reece, R. N. 
Benjamin Franklin. 
Cupid and Psyche. 
Dignity and Impudence. 
Dr. Carpenter, (W. B ) 
Ecce Homo. 
Fingal’s Cave. 
Genesis, Chap. I. (New Version after Darwin). 
George Washington. 
Gladstone. 
Gray’s Fdegy. 
Group of Elephants, from life. 
Hamlet’s Soliloquy. 
Happy as a King. 
Jesus bearing the Cross. 
Laying down the Law. 
Map of North America. 
Morning Hymn, Milton. 
Niagara Falls. 
Origin of Species, made easy. 
Panoramic View of Paris. 
Paul Preaching at Athens, (Raphael). 
Planet Jupiter, Belts and Moons. 
Planet Saturn, Rings and Moons. 
President Lincoln and ten Union Statesmen. 
Psalm of Life, by Longfellow. 
Pyramid of Ghizeh. 
Rustic Felicity. 
Sermon on the Mount. 
Signing of the Declaration, 1776. 
Song of the Shirt. 
“ Suffer Little Children to come unto Me.” 
Taking Down from the Cross. 
The Pashful Lover and the Maiden Coy. 
The Bower of Adam and Eve, Milton. 
The Creed. 
The Crucifixion, (M. Angelo). 
The Death of the Stag. 
The Gardener’s Daughter. 
The Great Rosse Telescope. 
The Lord’s Prayer. 
The Moon. 
The Moon, two Phases, Full and Gibbous (75c. 
The Stag at Bay. 
The Ten Commandments. 
The Three Graces. 
The Village Blacksmith, by Longfellow. 
Title- page of Punch. 
Venus. 
Yarn of the Nancy Bell. 
Windsor Castle. 
EDUCATIONAL SERIES 
Each 30 cents ; per dozen, $3.00. 
For the use of schools, students and investigators who often find the need 
of special- microscopic preparations, we offer the following line of objects. 
They are neatly mounted on the usual 3 x 1 in. slides, and securely finished 
with a plain ring of transparent cement ; they are, however, less elaborately 
prepared and finished than the preceeding. We recommend them as thoroughly 
reliable for use, whether in the laboratory or class-room. For teachers desiring 
to illustrate widely different lines of study, at small cost, they are particularly 
well adapted. 
No. 
4558, ANATOMICAL. 
Blood of man, dog, cat, ox, frog, fish, snake, fowl, etc. 
Human. Sections of finger, eye-lid, chin, nose, liver, lung, kidney, bone, ear, skin, 
scalp, spinal cord, brain, etc. 
Bird. Sections of brain, spinal cord, trachea, stomach, intestine, skin, lung, etc. 
Calf. Sections of ear, retina, skin, spinal cord, artery, vein, stomach, kidney, lung, etc. 
Cat. Sections of tongue, nose, lip, trachea, stomach, duodenum, ileum, kidney, lung, 
liver, pancreas, spleen, foot, skin, etc. 
Lizard. Sections of stomach, and other organs in situ. 
Rabbit. Sections of brain, medulla, spinal cord, ear, tongue, lip, nose, foot, stomach, 
duodenum, ileum, kidney, lung, liver, pancreas, etc. 114 
RAUSCH & I,OMR OPTICAL COMPANY, 
EDUCATIONAL SERIES—Continued. 
No. 
Rat. Sections of tongue, nose, lip, jaw, stomach, duodenum, ileum, kidney, lung, liver, 
pancreas, foot, skin, etc. 
Snake. Sections of brain, stomach, kidney, intestine, etc. 
4560, CRYSTALS. 
Actinolite, asbestos, amygdalin, berberine, bi-chromate of potassa, caffeine, chloride of 
strontium, chrome alum, hippuric acid, limonite in muscovite, nitra-prusside of sodium, 
oxalate of ammonia, picrate of ammonia, palminitic acid, sulphate of copper, stearic 
acid, salicin, satin spar, theine, etc. 
4562, PLANT TISSUES. 
Epidermis with stomata of grass, Indian corn, aloe, apple, iris, yucca, equisetum, 
deutzia, etc. 
Leaves. Sections of aloe, ricinus, India rubber tree, iris, lily, etc. 
Pollen of mallow, Hibiscus. Althea, Coboea, passion flower, pine, morning glory, 
Oenothera, etc. 
Seeds opaque, of Silene, Lychnis, Stellaria, Portulaca, Drosera, Oxalis, Gerardia, Pens- 
temon, etc. 
Spirals (dissected) of ricinus, lotus, etc., and scalariform ducts of fern. 
Stems. Sections of burdock, clematis, maple, mahogany, cane, sedge, lily, fern, 
equisetum, etc. 
4564, MISCELLANEOUS. 
Antennae of butterfly, moth, beetle, cricket, bee, cockroach, centipede, etc. 
Corner of house fly, meat fly, horse fly, bumble bee, honey bee, wasp, hornet, moth, 
butterfly, beetle, grasshopper, cricket, cockroach, dragon fly, etc. 
Feathers of fowl, guinea fowl, bobolink, humming bird, parrot, peacock, sparrow, 
canary, blue jay, etc. 
Fibres of cotton, flax, ramie, hemp, jute, manilla hemp, pine-apple, merino wool, 
Lincoln wool, Cotswold wool, Donskoi wool, Bagdad wool, Cashmere goat 
hair, camel’s hair, alpaca, vicuna ; silk of Chinese, Italian and French silk- 
worm ; silk of Cecropia silk-worm, etc. 
Gizzard of field cricket, mole cricket, cockroach, katydid, beetle, etc. 
Hairs of cat, dog, mouse, rat, mole, ground mouse, goat, cow, horse, bat, caterpillar, 
dermestes, rabbit, squirrel, man, etc. 
Head of small bee, house fly, meat fly, male mosquito, female mosquito, bug, grass- 
hopper, etc. 
Legs and feet of spider, honey bee, beetle, cricket, house fly, meat fly, centipede, 
mosquito, gyrinus, notonecta, etc. 
Ovipositor of house fly, meat fly, cricket, grasshopper, katydid, etc. 
Parasites. Flea of cat, dog and man ; bed-bug, head louse, wood tick, sheep tick ; lice 
of fowl, pigeon, swallow, beetle, house fly, grasshopper, etc. 
Proboscis of butterfly, moth, honey bee, bumble bee, fly, etc. 
Scales (opaque) of diamond beetle, wings of moth, silkworm moths, butterfly, etc. 
Scales of azure blue butterfly, silkworm moths, various butterflies, dermestes, lepisma, etc. 
Scales of trout, shad, eel, perch, sole, pike, herring, shark, etc. 
Spicules of sponge, gorgonia, etc. ; foraminifera, polycystina, etc. 
Spiracles of blow fly, house fly, silk worm, tobacco worm, honey bee, grasshopper, 
spider, etc. 
Wings of honey bee, bumble bee, crane fly, mosquito, house fly, meat fly, butterfly, 
moth, lace-wing fly, dragon-fly, etc. 
STUDENT SERIES. 
Each 10 cents ; per dozen, $1.00. 
4566, Imported objects, on slides 2| x { in. paper covered, comprising parts of insects, hair, 
feathers, starch, fibres, etc, ROCHESTER, N. Y., AND NEW YORK CPl'Y. 
115 
BOOKS ON OPTICS AND OPTICAL INSTRUMENTS. 
No. Price. 
4800, ALLING, CHAS. E. Microscopical Records. It is based on a form prepared 
by Prof. S. H. Gage, B. S. of Cornell University, and fills a want for which 
nothing has heretofore been provided. 
500 objects. Postage 1G cents. Net, - - - - - $8.00 
1000 objects. Postage 16 cents. Net, .... 4.00 
4802, BAILEY, W. W. Botanical Collector’s Plandbook, with many illustrations, 
12mo., cloth. Postage 9 cents. Net, ..... 1.50 
4804, BALLARD, J. P. Among the Moths and Butterflies. A revised and enlarged 
edition of “ Insect Lives,” 8vo. Illustrated. Postage 15 cents. Net, 1.85 
4803, BAUSCH, EDWARD. Manipulation of the Microscope. Second Edition. 
Bound in cloth. Postage 5 cents, ..... .75 
4808, BEALE, LIONEL S. How to work with the Microscope. Fourth Edition. 
Postage 24 cents. Net, ...... 7.50 
4810, BEALE, LIONEL S. The Microscope in Medicine. Fifth Edition. Postage 
26 cents. Net, ........ 7.50 
4812, BEHRENS, J. W. A Guide for the Microscopical Investigation of Vegetable 
Substances Translated from the German of Dr. Julius Wilhelm Behrens. By 
Rev. A. B. Hervey. 475 pages, profusely illustrated. Postage 27 cents. Net, 5.00 
4814, BEHRENS, J. W. Guide to the Microscope in Botany. Translated and revised 
by Rev. A. B. Hervey, A. M. Postage 24 cents. Net, ... 5.00 
4816, BESSEY, CHARLES E., Ph. D. Advanced Course, Botany for High Schools 
and Colleges. Postage 24 cents. Net, ..... 2.50 
4818, BESSEY, CHARLES E , Ph. D. Briefer Course. The Essentials of Botany. 
Postage 11 cents. Net, ....... 1.25 
4820, BLACKHAM, DR. GEO. E. Angular Aperture of Microscope Objectives. 
Postage 8 cents. Net, ------- 1.00 
4822, CARPENTER, WM. B. The Microscope and its Revelations. Seventh Edition. 
Revised by the Rev. W. H. Dallinger, L. L. D., F. R. S., etc. Postage 
36 cents. Net, - -- -- -- - 6.00 
4824, COOKE, M. C. 1000 Objects for the Microscope, with 400 engravings. Post 
free. Net, --------- .45 
4826, COOKE, M. C. Ponds and Ditches. Cloth, 250 pages, with over 100 excellent 
illustrations, especially referring to microscopical objects. Postage 6 cts. Net, .85 
4828, COOKE, M. C. Microscopic Fungi ; an introduction to the study of Rust, Smut, 
Mildew and Mould. Illustrated by nearly 300 figures, colored. Postage 
8 cents. Net, -------- - 2.00 
4830, CROOKSHANK, EDW. M., M. B. A Manual of Bacteriology. New Edition. 
Postage 20 cents. Net, ------- 6.00 
4832, CROOKSHANK, EDW. M., M. B. Photography of Bacteria. Illustrated by 
86 photographs, reproduced in autotype, and 6 wood cuts. R. 8vo., Cloth. 
Postage 14 cents. Net, - - \ - - - - - 4.50 
4834, DAVIES, THOMAS. The Preparation and Mounting of Microscope Objects. 
New Edition. Post free. Net, ------ 1.00 
4836, DAVIS, GEO. E. Practical Microscopy. Illustrated with 310 illustrations and 
a colored frontispiece. New and revised Edition. Postage 16 cents. Net, 2.00 
4838, DOLLEY, CHAS. S., M. D. The Technology of Bacteria Investigations. 
Explicit directions for the study of Bacteria. Postage 10 cents. Net, - 2.00 116 
BAUSCH & LOMB OPTICAL COMPANY, 
No. Price. 
4840, FREY, H. The Microscope and Microscopic Technology. A text-book for 
physicians and students. Illustrated by 388 engravings on wood. Octavo, 660 
pages, cloth. Post free. Net, 6.00 
4842, FRIEDLANDER, CARL. Microscopical Technology. For use in the Investi- 
gations of Medicine and Pathological Anatomy. Translated from the second 
enlarged and corrected edition by Stephen Yates Howell, M. A., M. D. Post 
free. Net, 1.00 
4844, GAGE, SIMON HENRY. The Microscope and Histology. Part 1., 5 full page 
plates and 8 figures in the text, heavy manilla. Postage 7 cents, - 1.00 
Half leather. Postage 7 cents, - - - - - - 125 
4846, GIBBES, HENEAGE. Practical Histology and Pathology. Third Edition. 
Postage 5 cents. Net, ------- 1.40 
4848, GOSSE’S Evenings’ at the Microscope, or researches among the minute organs 
and forms of animal life. 12mo. Postage 13 cents. Net, - - 1.20 
4850, IIEITZMANN, C., M. D. Microscopical Morphology of the animal Body in 
Health and Disease. 380 original engravings, made expressly for this work 
from Drawings by the Author. 8vo.. cloth. Postage 30 cents. Net, 7-00 
4852, JAMES, FRANK L., PH. D., M. D. Elementary Microscopical Technology. 
* Part 1. The Technical History of a Slide from the crude Material to the finished 
mount. Cloth, stiff cover. Post free. Net, - 1.00 
Flexible cover. “ “ - - - - .75 
Paper cover, “ “ - - - - .50 
4854, HOGG, JABEZ. The Microscope ; its History, Construction and Application. 
Illustrated with upwards of 500 engravings and colored illustrations. 750 pages. 
Seventh Edition. Postage 17 cents. Net, ----- 2.80 
4856, KINGSLEY, J. S. The Naturalists Assistant. With many Illustrations. A 
perfect Guide. 12mo., cloth. Postage 12 cents. Net, - - 1.35 
4858, LANCASTER, EDWIN. Half Hours with the Microscope ; being a popular 
guide to its use. New Edition. Profusely illustrated. Postage 5 cents. Net, 1.00 
4860, LEE. Vade Mecum. Second Edition. Postage 15 cents. Net, - - 4.00 
4862, MACDONALD. Examination of Water. Postage 10 cents. Net, - - 2.75 
4864, MARSH, SYLVESTER. Section Cutting ; a Practical Guide to the Preparation 
and Mounting of Sections for the Microscope, special prominence being given 
to the subject of Animal Sections. American Edition, 1879, cloth. Postage 
4 cents. Net, - -- -- -- - .65 
4866, MATHEWS, CHAS. GEO. and LOTT. FRANCIS E. The Microscope in the 
Brewery and Malt House. Illustrated 8vo., cloth. Postage 13 cents. Net, 7.50 
4868, MICROGRAPHIC DICTIONARY. By J. W. Griffiths and Arthur Ilenfrey. 
875 pages, illustrated by 53 plates and 800 wood engravings. Fourth Edition, 
Postage 37 cents. Net, ------- 20.00 
4870, MILLER, MAURICE N. Practical Microscopy. Illustrated with 126 photo- 
graphical reproductions of the author’s pen drawings Postage 13 cents. Net, 2.00 
4872, NAVE, JOHANN. Handy-Book to the Collection and Preparation of Fresh- 
W'ater and Marine Algae, Diatoms, Desmids, Fungi, Lichens, Mosses and other 
of the Lower Cryptogamia. Translated by Rev. W. W. Spicer, A. M., London, 
1 vol., 16mo. Postage 5 cents, ------ L00 
4874, PEYER, ALEX, M. D. An Atlas of Clinical Microscopy. Translated by A. C. 
Girard, M. D. 8vo , cloth. Post free. Net, - 6.00 
4876, PENHALLOW, D. P. Vegetable Histology 'Fables for the use of Students. 8vo., 
cloth. Postage 7 cents. Net, ------ L00 
4878, PHIN, JOHN. Practical Hints on the Selection and Use of the Microscope. 
New Edition, 231 pages, highly recommended. Postage 8 cents. Net, 1.25 
4880, PRINGLE, ANDREW. Practical Photo-Micrography. Fully illustrated. Cloth 
bound. Post free. Net - - - - - - - 2.50 
BOOKS ON OPTICS AND OPTICAL INSTRUMENTS—Continued. ROCHESTER, N. Y., AND NEW YORK CITY. 
117 
BOOKS ON OPTICS AND OPTICAL INSTRUMENTS-Continued. 
No. 
. Price. 
48S'3, PROCTOR, RICHARD A. Half Hours with the Telescope. With numerous 
illustrations on stone and wood Postage 4 cents. Net, - - 1.00 
4884, SLACK, HENRY J. Marvels of Pond Life. Second Edition. With colored 
plates and numerous wood-cuts. Post free. Net, - - - . 1 50 
4880, SMITH, J. EDWARDS. How to see with the Microscope. 400 pages, illustrated. 
Postage 14 cents. Net, - 150 
4888, STOKES, AL1RED C., M. D. Microscopy for Beginners, or common objects 
from the Ponds and Ditches. Illustrated. Postage 9 cents. Net, - 1.20 
4890, STRASBURGER, DR. E. The Microscope in Vegetable Histology. Translated 
and revised by Rev. A. B Hervey, A. M. Illustrated, 8vo., cloth. Postage 
17 cents, Net, - - . . _ . . - 2 50 
4892. TRELEASE, WM. Botanical Micro-Chemistry. From the original of V. A. 
Poulsen. 12mo., cloth. Postage 5 cents. Net, - - . . 1 00 
4894, WHITMAN, C. O. Methods of Microscopical Investigations in Anatomy and 
Embryology. Illustrated, 8vo., cloth. Postage 14 cents. Net, - - 8 00 
4896, WOOD, J. G. Common Objects of the Microscope. With upwards of 400 illus- 
trations, printed in colors. Postage 8 cents. Net, - - - .50 
Plain plates. Postage 3 cents Net, - - . . 35 
4898, WORMLEY, THEODORE G., M. D„ PH. D„ LL. D. Micro-Chemistry of 
Poisons. Including their Physiological, Pathological and Legal Relations. 
With an Appendix on the Detection and Microscopic Discrimination of the 
Blood. Adapted to the Use of the Medical Jurist, Physician, and General 
Chemist. By I heodore G. Wormley, M. D., Ph. D., LL. D., Professor of 
Chemistry and Toxicology in the Medical Department of the University of 
Pennsylvania. A new revised and enlarged Edition, with new Illustrations. 
Large 8vo. Extra cloth. Postage 35 cents Net, - . - fj.OO INDEX. 
Page. 
Abbe Condensers, Sub-stage, - 62 
Abbe Improved, Camera Lucida, - 60, 61 
Absolute Alcohol, Dr Squibbs, - 90 
Accessorit s, - - - - 59-92 
Accessories for Telescopes, - 100 
Achromatic Amplifiers, - 60 
Achromatic Triplets, - - 101 
Acid. Nitric, 90 
Adapters, - 00 
Alcohol, Absolute, Dr. Squibbs, - 90 
Amber Cement, ... 90 
Ammonia Carmine, ... 90 
Amplifier, achromatic, - 60 
Analyzer, - - - 70 
Anatomical Instruments — Dissecting, 86 
Anatomical Scissors, 84 
Anatomical Sets, Diss. Inst., - 86 
Aniline Oil, 90 
Aniline Stains, - 90 
Aperture, numerical table of, - 46 
Apparatus, ... 73 
Apparatus for Numeration of Blood Corp., 76 
Apparatus for Solidifying Blood Serum, 76 
Apparatus for Steam Sterilization, - 73 
Apparatus for Vegetation, - 74 
Asphaltum, - - - 90 
Atwood Rubber Cells, - - 91 
Arnold’s Steam Sterilizer, - - 75 
Bacillus Tuberculosis Stain, - 90 
Balsam, Canada, - - - 90 
Basket, Sterilization, - - 74 
Bath, Paraffine, - - - 76 
Bath, Water and Oven, - - 76 
Beaker Glasses, - - - 78 
Bell Glasses, ... 77 
Benzole, .... 90 
Binocular Microscopes, - - 36, 37 
Bismarck Brown, 90 
Block Tin Cells, ... 91 
Blue Glass, Hopkins, - - 60 
Books on Optics and Optical Instru- 
ments, - - - - 115-117 
Borax Carmine, - - - 90 
Botanical and Microscopical sets Dis- 
secting Instruments, - - 86 
Botanical Instruments, Dissecting, 86 
Bottles, Capped, ... 78 
Bottles, Collecting, - - 77 
Bottles, Dropping, ... 78 
Box metal sterilization, - - 74 
Box Slide, cloth covered, 91 
Boxes, Mailing, ... 91 
Bradley’s Mailing Cases, 91 
Brain Knives, ... 82 
Brass Table, .... 80 
Brown’s Transparent Rubber Cement, 90 
Brunswick Black, ... 90 
Bulls Eye Condensers, 90 
Cabinets, Pillsbury’s, - - 92 
Cabinets, Portable, - - - 92 
Cah spar, Quartz Selenite and Mica 
Preparations, ... 99 
Camel’s Hair Pencils, - - 85 
Camel’s Hair Pencils, Swan quill, 85 
Camera Lucida, - 60, 61 
Camera Photo-Micro, small, - 93, 94 
Camera Photo-Micro, large, - - 94, 95 
Camera Photo-Micro, professional, 96, 97 
Canada Balsam, ... 90 
Capped Bottles, ... 78 
Carbonate of Potash, - - 90 
Carmine Gelatine, Injecting, - 90 
Page. 
Carrier Slide and Glass Stage, - 66 
Cartilage Knives, - . - 82 
Cases, Mailing, Bradley’s, - 91 
Cases, Re-agent, - 87, 88 
Caustic Potassa. - 90 
Cedar Oil, - - - 90 
Celloidine, ... 90 
Cells, Atwood, Rubber, 91 
Cells, Block, Tin, - - 91 
Cells, Glass, 91 
Cells, Rubber, - 91 
Cells, Zylonite, 91 
Cement, Brown’s Transp. Rubber, 90 
Cement, Kings, - - - 90 
Cement, White Zinc, - 90 
Cloth Covered Slide Box, 91 
Cloves, Oil of, - - - 90 
Collecting Bottles, 77 
Combined, Inverted and Vertical Mi- 
croscope, ... 32-85 
Compressors, 61 
Compressors. Springs, - - 80 
Concave and Convex Lenses, - 98 
Condenser, Mounting, - - 62, 63 
Condensers, Bulls Eye, - - 61 
Condensers, Sub-stage, Abbe, - 62 
Continental Eyepieces, - - 53 
Continental Microscopes, - - 9-13 
Continental Microscope, (small) A, 8, 9 
Continental Microscope, (medium) B, 10, 11 
Continental Microscope, (large) C, 12, 13 
Convex and Concave Lenses, - 98 
Convex Condensing Lenses, - 98 
Cover Glass Forceps, - - 80 
Cover Glass or Slide Forcep, - 84 
Cover Glass Gauge, 81 
Covers, Thin Glass, - - 89 
Covers and Labels for Slides, - 89 
Crown Glass Slips, - 89 
Current Slide, Holman’s, 66 
Damar, ... - 90 
Deane’s Medium, - - - 90 
Demonstration Lenses, - 98 
Diaphragm, Dome, 64 
Diaphragm, Iris, ... 64 
Differential Screw, Fine adjustment, 65 
Dimensions of Microtomes, - 56 
Directions for ordering Eyepieces, 53 
Dishes, Evaporating, 78 
Dissecting Forceps, - - 84 
Dissecting Instruments, Anatomical, 
Botanical and Microscopical, - 86 
Dissecting Knives, - 82 
Dissecting and Section Knives, - 82 
Dissecting Microscopes, - 38-43 
Dissecting Microscope, (Educational) U, 40,41 
Dissecting Microscope, (Excelsior 
pocket), S, - - - 38, 39 
Dissecting Microscope, (Folding) V, 42, 43 
Dissecting Microscope, (Handy) R, 38, 39 
Dissecting Microscope, (Primary) T, 40, 41 
Dissecting Microscope and Mounting 
Instruments, - 77 
Dissecting Needle Holder, 83 
Dissecting Needles, - - 83 
Dissecting Scissors, ... 83, 84 
Dome Diaphragm, - 64 
Double or Plano Convex and Concave 
Lenses, 98 
Double Prism, Camera Lucida, - 60 
Double Wall Sterilization Apparatus, 74 
Draw-tube, graduated, - - 65 KUC HESi KK, N. Y., AND NEW YORK CITY. 
119 
x Page. 
Dropping Bottles, - 78 
Educational Microscope, Dissecting, U, 40, 41 
Engraver Glass, ... 104 
Eosine, - - - - 90 
Evaporating Dishes, 78 
Excelsior Pocket and Dissecting Micro- 
scopes, S, - - - 38, 39 
Eyepiece Micrometer, - - 68 
Eyepiece Micrometer, how to use, 47 
Eyepieces, - - - 52, 53 
Eyepieces, power of, - - 47 
Eyepieces, Spectroscopic, - - 72 
Eye Shades, - 65 
Farrant’s Medium, 90 
Ferro-Cyanide Potassa. - - 90 
Filar Micrometer, 69 
Finder, Maltwood, - - 66 
Fine Adjustment, Differential Screw, 65 
Finger, Mechanical, - - 66 
Fish Trough, 66 
Folding Dissecting Microscope, V, 42, 43 
Forceps, Cover Glass, - - 80 
Forceps, Dissecting, 84 
Forcep Slides or Cover Glass, - 84 
Forcep Stage, - - - - 70, 71 
Freezing Attachment, - - 57 
Fritsch’s Knives, 82 
Fuchsine, - - - - .90 
Funnel, Hot Water, 76 
Gauge, Cover Glass, - - 81 
Gentian, Violet, - - - 90 
Glass, Cells, ... 91 
Glass Covers, Thin, - 89 
Glass. Engraver, - 101 
Glass Pipettes, - - - 77 
Glass Slips, Crown, - - 89 
Glass Slips, Plate, 89 
Glass Spirit Lamps, - - 80 
Glass Stage and Slide Carrier, - 66 
Glass Stirrers, - 77 
Glasses, Beaker, 78 
Glasses, Watch, - 79 
Glasses, Watch, Syracuse, - - 79 
Glasses, Watchmaker, - - 103 
Glue, Hollis, 90 
Glue, Marine, - 90 
Glycerine, 90 
Gold Size, - 90 
Graduated Blue Glass, - - 60 
Graduated Draw-tube, - - 65 
Haemacytometer, 76 
Haemaglobinometer, - - 76 
Haematoxylin, 90 
Half Button, Wenham’s, - - 71 
Handy Dissecting Microscope, R, 38, 39 
Harvard Microscope, E, - - 18, 19 
Hemispherical Illuminator, - 66 
Holder, Dissecting, Needle, - 83 
Holder, Knife, - 58 
Hollis. Glue, 90 
Holman’s Current Slide, - - 66 
Holman’s Life-Slide, - - 66 
Holman’s Syphon-Slide, - - 66 
Hopkins Blue Glass, - - 60 
Hot Water Funnel, - - 76 
Huyghenian Eyepieces, - - 53 
Illuminator, Hemispherical, - 66 
Illuminator, Vertical, - - 66 
Improved Photo-Micro Camera (large), 94, 95 
Improved Photo-Micro Camera (small), 93, 94 
Injecting Gelatine, Carmine, - 90 
Injecting Syringe, - - - 79 
Instructions for using Micrometer, 47 
I’^e. 
Instrument, Sterilizer, Special, - 75 
Instruments, Anatomical, - , 86 
Instruments, Botanical, - - 86 
Instruments, Dissecting, - 86 
Instruments, Microscopical, 86 
Instruments, Mounting and Dissecting, 77 
Inverted and Vertical Microscopes, 32-85 
Investigator Microscope, H, - - 24, 25 
Iodo-Iodide Potassa, - - 90 
Iris Diaphragm, - - (54 
Iris Diaphragm, Condenser Mounting, 63 
King’s Cements, ... 90 
King’s Lacquer Cell, 90 
Knife Holder, ... 58 
Knives, Brain, 82 
Knives, Cartilage, - - 82 
Knives, Dissecting, - - - 82 
Knives, Dissecting and Section, - 82 
Knives, Fritch’s, 82 
Knives, Microtome, - - 55 
Knives, Section, - - - 82 
Knives, Valentine, - - 82 
Labels and Covers for Slides, - 89 
Laboratory Microscope, M, - 32, 33 
Laboratory Microtomes, - - 54, 55 
Lacquer, Cell, King’s, - 90 
Lamps, Spirit, Glass, - - 80 
Large Continental Microscope, - 12, 13 
Large Photo-Micro Camera, - - 94, 95 
Lenses, Concave and Convex, - 98 
Lenses, Condensing Plano Convex, 98 
Lenses, Demonstration, - - 98 
Library Microscope, D, - 16, 17 
Life Box, .... 66 
Life Slide, Holman’s, - - 66 
Lifter’s, Section, - - - 85 
Linear Magnifying Powers of Objectives 
and Eyepieces, - - 47 
Linen-Provers, ... 103 
Magnifiers, ... 101-104 
Magnifiers, Coddington, - - 101 
Magnifying Powers, Tube of, - 47 
Mailing Boxes, 91 
Mailing Cases, Bradley’s, - 91 
Maltwood Finder, - - - 66 
Marine Glue, ... 90 
Mechanical Finger, - 66 
Mechanical Stages, - - 67 
Medium, Continental Microscope, 10, 11 
Metal Sterilization Box, - - 74 
Methyl Stains, - 90 
Mica, Calcspar, Quartz and Selenite 
Preparations, 99 
Micrometers, ... 68 
Micrometer, Instructions for using, 47 
Micrometer Screw, - - - 65 
Microscopes, Binocular, - - 36, 37 
Microscopes for Special Purposes, 30-35 
Microscopical Instruments, Dissecting, 86 
Microscopic Objects, - - 105-114 
Microtomes, - 54-57 
Microtome Freezing Attachment, 57 
Microtome Knives, 55 
Microtome with clamp for Table Top, 57 
Model Microscope, F, - 20, 21 
Mounting and Dissecting Instruments, 77 
Mountings for Sub-stage Condensers, 62, 63 
Mounting Stand, 80 
Mounting and Staining Media, - 90 
Mounting Table, 80 
National Turn Table, - - 88 
Needles, Dissecting, 83 
Needle-Holder, Dissecting, - 83 BAUSCH & LOME OPTICAL COMPANY, 
Tage. 
Nicois* Prisms, /- - - 99 
Nitric Acid, ... 90 
-Nosepieces, - jr ' - - 69 
Nulftegical Table of, - 40 
Numerator) of Brood Corpuscles, 
- - - 76 
Objectives, ... 45-51 
Objectives, Powers of, - - 47 
Objectives, Series I, - - - 48 
Objectives, Series II, - - 49 
Objectives, Series III, - - 50 
Objectives, Series IV, - 51 
Objectives, Telescope, - - 100 
Objects. Microscopic, - 105-112 
Oil of Cloves, ... 90 
Osmic Acid. .... 90 
Oven and Water Bath. - - 76 
Paraboloid, - - - 69 
Paraffine, ... 90 
Paraffine Bath, 76 
Pencils, Camel’s Hair,’ - - 85 
Pencils, Camel’s Hair, Swan Quill. - 85 
Petrographical Microscope L., - 30, 31 
Petri Dishes, - - - 77 
I’henolphtaline, ... 90 
Photo-Micro Camera, Improved, Small, 93, 94 
Photo-Micro Camera, Improved, Large, 94,95 
Photo-Micro Camera, Professional, 96. 97 
Physician Microscope, A, - 22, 23 
Pillsbury’s Cabinets, - - 92 
Pipettes, Glass, 77 
Plano-Convex Condensing Lenses, 98 
Plano or Double Convex and Concave 
Lenses, - - - 98 
Plate Glass Slips, - 89 
Pocket and Dissecting Excelsior Micro- 
scope, .... 38,39 
Polariscopes, ... 70 
Porcelain Saucers, 79 
Potash, Carbonate of, - - 90 
Potassa, Caustic, ... 90 
Potassa lodo Iodide, - - 90 
Potas. Ferro-Cyanide, 90 
Towers of Objectives and Eyepieces, 
Table of, - - - 47 
Primary Dissecting Microscope, T, - 40, 41 
Prisms, Nicols, - 99 
Prisms, Rectangular, - - 100 
Prisms, Woodward, - - 70 
Professional Microscope, K, - - 28, 29 
Professional Photo-Micro Camera, 96, 97 
Quartz, Calcspar, Selenite and Mica Pre- 
parations, - - - 99 
Razor-Holder, - 58 
Reading Glasses, - 104 
Re-Agent Cases, - - - 87,88 
Rectangular Prism, - - - 100 
Revolving Table, - - 71 
Rubber Cells, Atwood, - - 91 
Rubber Cells, - 91 
Rubber Cement, - - - 90 
Saffranine. - - - 90 
Saucers, Porcelain, - - 79 
Scalpels, Dissecting, - - 82 
Scissors, Anatomical, 84 
Scissors, Dissecting, - - 83, 84 
Screw, Micrometer, - - - 65 
Section and Dissecting Knives, - 82 
Section Flattener, 58 
Section Knives, ... 82 
Section Lifters, - - - 85 
Selenites, - 70 
Selenites, Calcspar, Quartz and Mica 
Preparations, - - 99 
Page. 
Simple Microscopes, - - 38-43 
Slide Box, (. loth covered, - - 91 
Slide-Carrier and Glass stage, - 66 
Slide or Coverglass Forcep, 84 
Small Continental Microscope, A, 8. 9 
Small Photo-Micro Camera, - 93, 94 
Solid Eyepieces, - 53 
Solidifying Blood Serum Apparatus for 
Sterilization Apparatus, - - 73 
Special Instrument Sterilizer, • 75 
Spectroscopic Eyepieces, 72 
Spectroscopic Eyepieces, Abbe’s, 72 
Spirit Lamps. Glass, - - 80 
Spring Compressors, - - 80 
Stage Forceps, - 70, 71 
Stage-Glass and Slide-Carrier, - 66 
Stage, Mechanical, - 67 
Stage Micrometer, - - - 68 
Stain for Bacillus Tuberculosis, - 90 
Standard Watch Glass, - 79 
Stand Mounting, - - 80 
Steam Sterilization Apparatus, - 73-75 
Sterilization Apparatus, Steam, - 73-75 
Sterilization Apparatus. Double Wall. 73-75 
Sterilization Basket, 74 
Sterilization, Box Metal. - - 74 
Sterilizer Special Instrument. - 75 
Stirrers, Glass, ... 77 
Student Microtome, - - - 54, 55 
Sub-stage Attachment, - - 63, 64 
Sub stage Condenser, - - 62 
Sulpho-Indigotate Soda, - - 90 
Swan Ouill, Camel’s Hair Pencils, 85 
Swinging Sub-stage Attachment, - 63 
Syphon-Slide, Holman’s, - - 66 
Syringe Injecting, ... 79 
Table, Brass, ... 80 
Table, Mounting, 80 
Table, Numerical Aperture, - 46 
Table, Revolving, 71 
Telescope Accessories, - - 100 
Telescope Objectives, - - 100 
Tenaculum, ... 82 
Test Tubes, 77 
Thermostat, ... 76 
Thin Glass Covers, -, - - 89 
Transparent Rubber Cement, Brown’s, 90 
Triplets, Achromatic, - - 101 
Trough, Fish, ... 66 
Trough, Zoophyte, 71 
Turntable, National, - - 88 
Turntables, 88 
Turpentine, ... - 90 
Universal Microscope, J, - 26, 27 
University Microscope N - 34, 35 
Valentine Knives, - - - 82 
Vegetation Apparatus, - - 74 
Vertical Illuminator, - - 66 
Vertical and Inverted Microscopes, 32-35 
Vesuvin, - - - - 90 
Ward’s Eye-shade, * - - 65 
Watchglasses, - - - 79 
Watchglasses, Standard, - - 79 
Watchmaker glasses, - - 103 
Water Bath and Oven, - - 76 
Water Funnel Hot, 76 
Wenham’s Half Button, - - 71 
White Cement, King’s, - - 90 
White Zinc Cement, - - 90 
Woodward Prism, ... 70 
Xylol, pure, ... 90 
Zinc, Cement, White, - - 90 
Zoophyte, Trough, - - 71 
Zvlonite Cells, - - - 91