TWENTY-SIXTH EDITTOIf PART SECOND, PEL L. FOX. JESSE S. CHEYNEY WILLIAM H. WALMSLEY PRICED AND ILLUSTRATED CATALOGUE OF OPTICAL INSTRUMENTS. JAADE, ANtfjSOLD, AND j^ETAIL* BY JAMES W. QUEEN A CO. No. 924 Chestnut Street, Philadelphia, AND No. 535 Broadway, New York. 1872. Pricej Ten Cents. PRICED AND ILLUSTRATED CATALOGUE OP OPTICAL INSTRUMENTS, MADE, IMPORTED AND SOLD, WHOLESALE AND RETAIL, BT JAMES W. QUEEN & CO. No. 924 Chestnut Street, Philadelphia, AND No. 535 Broadway, New York. Philadelphia, April 11, 1870. On retiring from tlie business which I established in 1853, and have been conducting at No. 924 Chestnut Street since that year, it gives me pleasure to recommend to my friends and former patrons, my successors, and solicit for them a continuance of the favors so freely bestowed upon myself. The present firm propose dividing their business into three departments, each partner giving one of those departments his special care and attention. Samuel L. Fox, my former partner, will devote himself to the Mathe- matical Department, which will comprise Drawing Instruments, of every description, Surveying Compasses, Engineer’s Transits and Levels, Surveying Chains, Tape Measures, Drawing Papers, and materials of all kinds used by engineers and draughtsmen. Jesse S. Ciieyney, formerly Principal of Friends’ Select School, in this city, will take the Department of Philosophy, which will comprise Magic Lanterns, Oxy-Calcium and Oxy-IIydrogen Stereoscopticons, with Pictures and Illustrations from all countries and upon all scientific subjects; Ther- mometers, Barometers, Globes, Air Pumps, Electric Machines, Magnetic Apparatus, &c., &c. William II. Walmsley, well known throughout the country as a Microscopist, and also a preparer of Microscopic Specimens, will take the Department of Optics, which will comprise Spectacles, Microscopes, Micro- scopic Objects and Accessories, Opera Glasses, Spy Glasses, Telescopes, Ophthalmoscopes, &c., &c. The new firm will continue to issue Priced and Illustrated Catalogues as follows:—Part 1st. Mathematics; Part 2d. Optics; Part 3d. Magic Lanterns and Stereopticons ; Part 4th. Philosophical Instruments. Care will be taken in each department of the business that the instru- ments manufactured by the firm shall be well made, and accurate for the purposes intended; and that all new instruments and improvements, of both European and American manufacture, shall be introduced with as little delay as possible. JAMES W. QUEEN CATALOGUE OF OPTICAL INSTRUMENTS. MODEL OP THE EYE, FOE SCHOOLS AND COLLEGES. No. 1200. 1201. Prick. 1200. Represents the globe of the eye, containing the various coats and parts, which can be successively removed, showing the arrangement of the eye as it appears on dissection. The globe is about four inches in diameter, and supported on a stand, . . . . . . . $7 50 1201. Displays the attachment of the muscles, and the manner in which the eye is moved in the socket, ........ 4 50 1202. Is the apparatus for illustrating the position of the image with re- gard to the retina in perfect, long and short sight. The inversion of the image by the crossing of the rays (shown by 'silk cords) is seen much more perfectly than in any other construction, . 6 00 1203. Model of the Eye, complete, of large dimensions, made of papier mache, with the muscles, blood- vessels, nerves, membranes, vitreous humor, &c., all colored to nature, 40 00 L204. The same, cut vertically 40 00 These are the most complete models ever offered for instructing classes, being large enough to be seen at the end of the lecture-room; many of the parts can be detached to facilitate the illustration. They are made by Dr. Auzoux, of Paris. 1205. Map or Diagram of the Eye, (22x15 inches), handsomely colored, . 1 00 1202. 4 LENSES AND OBJECT GLASSES. No. 1206. Demonstration Lenses. A set of six. If inches diameter, showing the formation of the various kinds of lenses, per set, . . . . $2 50 1207. Oculist’s Set of Test Lenses, containing one pair each of the following double convex lenses: If, 2, 2f, 2J, 2f, 3, 3f, 3*, 3f, 4, 4f, 4J, 5, 6,7, 8,9,10,11,12, 13, 14, 15, 16, 18, 20, 24, 27, 30, 36, 48, 60 inches focus; one pair each double concave lenses of the same foci; one pair each plain prisms, having th'e acute angle 2, 4, 6, 8, 10, 12, 13, 14,16, 18, 20, 22 and 24 degrees; one pair each plain colored lenses, green, blue and smoke; one pair silver-plated trial spectacles with spring, to which all the lenses have been carefully- fitted, and into which each lens can be inserted and used as occasion may require. The whole packed in a mahogany box, with lock and key, 80 00 1208. Instrument for demonstrating the principle by which spectacles assist vision, both of old or impaired sight and near or 6hort sights, . . 7 00 LENSES. Price. 1206. 00SM0EAMA LENSES. 1209. Double or Plano-Convex Lens, 8 inches diameter, and either 30, 36, 48 or 72 inches focus, each, 5 00 1210. Double or Plano-Convex Lens,7inches diameter, same foci as 1209, each, 4 00 1211. Double or Plano-Convex Lens, 6 inches diameter, of either 24, 30, 36, 48 or 72 inches focus, each, 3 00 1212. Double or Plano-Convex Lens, 5 inches diameter, of either 18, 20, 24, 30, 36, 48 or 72 inches focus, each, 2 50 1213. Double or Plano-Convex Lens, 4 inches diameter, of either 12, 14. 16, 18, 20, 24, 30, 36, 48 or 72 inches focus, each, . . . . . 1 50 1214. Double or Plano-Convex Lens, 3 in. diam., any focus 6 to 36 in., each, 1 r 1215. Double or Plano-Convex Lens, 2 in. diam., any focus 6 to 36 in., each, 1216. Double or Plano-Convex Lens, 1£ in. diam., any focus 5 to 48 in., each. MICE0S00PE AND TELESCOPE LENSES. 1217. Double or Plano-Convex Lens, 1 inch diameter, 2 inches focus, . . 75 1218. Do. do. £ do. l£ do. . . 75 1219. Do. do. | do. l£ do. . . 75 1220. Do. do. £ do. 1 do. . . 75 1221. Do. do. | do. £ do. . 75 1222. Do. do. £ do. £ do. . . 75 1223. Do. do. do. £ do. . . 75 1224. Do. do. £ do. £ do. . . 75 A0HE0MATI0 OBJECT-GLASSES for SPY-GLASSES and TELESCOPES. Achromatic lenses are formed by a combination of a double convex lens of crown glass and a plano-concave or a concavo-convex lens of flint glass. The advantages of a lens formed in this manner are freedom from spherical aberration or distortion, and the rays of light are not decomposed into the primary colors; in other words, the light passes through the lens and suffers no change thereby. 1225. Achromatic Object-Glass, l£ inches diameter, 18 to 30 inches focus, 2 00 1226. Do. do. if do. 18 to 30 do. 3 50 1227. Do. do. 2 do. 18 to 30 do. 4 50 1228. Do. do. extra fine finish, 2 in. diam., 36 inches focus, 7 00 1229. Do. do. do. 2£ do. 44 do. 13 Ofl 1230. Do. do. do. 3 do. 48 do. 37 00 1231. Do. do. do. 3J do. 54 do. 50 00 1232. Do. do. do. 4“ do. 60 do. 90 00 1225. PHIS MS AND 8PECTACLES. 5 No. PEISMS. Price. 1235. Solid Flint Glass Prisips, 2 inches long, each, $0 65 1236. Do. do. 3 do. 75 1237. Do. do. 4 do. 1 15 1238. Do. do. 5 do. 2 00 1239. Do. do. 6 do. 3 50 1240. Solid Glass Prism, 5 inches long, its length compQsed pf flint glass, J of crown, and £ plate glass, 3 00 1241. Metal Stands for Prism, each, * 1 50 1242. Prisms for Stereoscopes, l£ inches square, per pair, .... 75 1243. Polyprism, making many heads out of one, 25 1244. A Set of two Prisms, to illustrate the principle of the Achromatic Object-glass, 3 00 1245. Hollow Glass Prisms, for showing the different refracting powers of fluids, 1246. Color Blender, or Prismatic Top, for the recomposition of light; formed in the shape of a top, which, by means of a string and handle, may be rapidly spun round, . 2 50 1247. "Wooden Disk, 13 inches in diameter, having the primary colors properly arranged to produce white, when the disk is revolved very rapidly upon the handle which accompanies it, 5 25 1248. Kaleidoscope Color Top. A very beautiful piece of apparatus for ex- hibiting the retention of color on the retina of the eye. ... 75 Of either Octagon, Oblong, or Oval Shaped Eyes, and fitted with either Double or Periscopic Convex or Concave Lenses. GOLD SPECTACLES. Ladies’ Pattern. 1255—Octagon. 1255—Oblong. 1255—Oval. 1259—Very Light 1255. Ladies’ Pattern, sides in one piece, 11 carat gold, per pair, . . . 8 00 1256. Do. do. 13 do. ... 10 50 1257. Do. do. 16 do. ... 11 50 1258. Do. do. 18 do. ... 14 00 1259. Do. do. extra light and delicate, per pair, 12 00 6 SPECTACLES. Narrow Sliding Sides. 1260—Octagon. 1260—Oblong. 1260—Oval. No. 1260. Narrow Sliding Sides, 11 carat gold, per pair, $12 00 1261. Do. do. 14 do. 14 00 1262. Do. do. 16 do. 16 00 1263. Do. do. 18 do. . . . 18 00 Price. Turn-Pin Sides. 1264—Octagon. 1264—Oval. 1264—Oblong. 1264. Turn-pin Sides, 11 carat, gold, per pair, . . . „ . . . 12 00 1265. Do. 14 do. 14 00 1266. Do. 16 do. 18 00 1267. Do. 18 do. 23 50 1268. Do. very light and delicate, per pair, . . . . 13 00 1269. Broad Sliding Sides, 11 carat gold, per pair, . . . . . 17 00 1270. Do. 14 do. 21 00 1271. Do. 16 do. 25 00 1272. Do. 18 do. 30 00 Convex or concave pebbles fitted in any of the above frames at an addi- tional cost, per pair, ......... 3 50 The gold in all the above spectacles is warranted to be the U. S. Mint standard of each quality. Any other desired pattern made to order. SPECTACLES. 7 PUEE SILVER SPECTACLES. Single Sides, or Ladies’ Pattern with Octagon, Oval or Oblong- Shaped Eyes. 1275—Octagon. 1275—Oval. No. 1275—Oblong. Price. 1275. Fitted with double convex or Periscopic convex lenses, per pair, . $2 50 1276. Fitted with double concave or Periscopic concave lenses, from 6 to 36 inch focus, per pair, 3 00 1277. Fitted with double concave or Periscopic concave lenses, from 1 to 6 inch focus, per pair, 3 50 1278. Fitted with double convex or double concave pebble lenses, per pair, . 6 00 1279. Fitted with double Periscopic convex or Periscopic concave pebbles, per pair, 7 00 1280. Fitted with divided glasses for far and near sights, per pair, . . 4 00 Light Double Sides, or Gentlemen’s Pattern, with Octagon, Oval or Oblong-Shaped Eyes. 1281—Octagon. 1281—Oval. 1281—Obloug. 1281. Fitted with either double convex or Periscopic convex lenses, per pair, 3 00 1282. Fitted with either double concave or Periscopic concave lenses, from 6 to 36 inch focus, per pair, 3 25 1283. Fitted with either double concave or Periscopic concave lenses, from 1 to 6 inch focus, per pair, 3 75 1284. Fitted with either double convex or concave pebbles, per pair, . . 6 25 1285. Fitted with either double Periscopic convex or concave pebbles, per pair, 7 25 1286. Fitted with divided glasses for far and near sights, per pair, . . 4 25 8 SPECTACLBS. Single Sides, or Ladies’ Pattern, with either Octagon, Oval or Oblong-Shaped Eyes. TEMPEEED ELASTIC STEEL SPECTACLES. 1290—Octagon. 1200—Oval. 1290—Oblong. Jto- Prick. 1290. Finest finished frames, with double convex or Periscopic convex glasses, per pair, . . . $2 00 1291. Finest finished frames, with double concave or Periscopic concave glasses, from 6 to 36 inch focus, inclusive, per pair, . . . 2 50 1292. Finest finished frames, with double concave or Periscopic concave glasses, from 1 to 5 inch focus, inclusive, per pair, . . . . 3 00 1293. Finest finished frames, with green, blue or smoke colored glasses, per pair, 2 00 1294. Finest finished frames, with convex or concave pebbles, per pair, . 6 00 1295. Medium finished frames, with double convex or Periscopic convex glasses, per pair, 1 25 1296. Medium finished frames, with double concave or Periscopic concave glasses, from 6 to 36 inch focus, inclusive, per pair, . . . 1 75 1297. Medium finished frames, with double concave or Periscopic concave glasses, from 1 to 5 inch focus, inclusive, per pair, . . . . 2 25 1298. Medium finished frames, with green, blue or smoke colored glasses, per pair, 1 75 Turn-Pin or Double Sides, for Gentlemen, with either Oblong or Oval-Shaped Eyes. 1299—Oblong. 1299—Oval. 1299. Finest finished frames, with double convex or Periscopic convex glasses, per pair, .......... 2 00 1300. Finest finished frames, with double concave or Periscopic concave glasses, from 6 to 36 inch focus, inclusive, per pair, . . . 2 50 1301. Finest finished frames, with double concave or Periscopic concave glasses, from 1 to 5 inch focus, inclusive, per pair, . . . . 3 00 SPECTACLES. 9 No. Paid. 1302. Finest finished frames, with green, blue or smoke colored glasses, per pair, $2 50 1303. Finest finished frames, with double convex or concave pebbles, per pair, 6 00 1304. Medium finished frames, with double convex or Periscopic convex glasses, per pair, $1 50 to 1 75 1305. Medium finished frames, with double concave or Periscopic concave glasses, from 6 to 36 inch focus, per pair, 2 00 1306. Medium finished frames, with double concave or Periscopic concave glasses, from 1 to 6 inch focus, per pair, 2 50 1307. Medium finished frames, with green, blue or smoke colored glasses, per pair, 2 00 1308. Medium finished frames, with D shaped and side eyes, with green, blue or smoke colored glasses, per pair, 2 50 Pulpit Spectacles, Elastic Steel Frames, Straight or Double Sides, 1309. 1309. Finest finished frames, with double convex or Periscopic convex glasses, per pair, 2 00 The Pulpit Spectacles are very convenient for public speakers who require spectacles to read their notes; the tops of the glasses being made straight, or nearly so, allow the wearer to look over them when the eyes are directed to the audience. 1310. 1310. Invisible Spectacles, with the frames set in the glasses, that they may not be seen. These Spectacles are particularly adapted to the com- fort of near-sighted persons when riding on horseback, as the sides are made with hooks passing behind the ears, thus preventing the Spectacles being jolted off the face. They are the lightest article ever made, per parr, $3 00 to 4 00 1311. German Silver Plated Spectacles, per pair, 75 1312. German Silver Plated Spectacles, with Cataract Glasses, per pair, . 2 60 1313. Millers’ or Turners’ Spectacles—common frames, with large eyes and plain white glasses, to guard the eyes from chips, per pair, . . 75 A great variety of Steel and other Spectacles, in assorted dozens, at low prices to the trade. 10 No. EYE-GLASSES. Prick. HAND AND NOSE SPECTACLES, &c. 1316. 1319. 1320. 1321 1315. Eye-glasses, solid gold, to fold, in gold covers, per pair, . $30 00 to 50 00 1316. Do. do. spring in joint, per pair, . • . 10 00 to 15 00 1317. Do. gold plated spring in joint, per pair, . . . 5 00 to 10 00 1318. Do. solid gold, oblong, oval or octagon shaped eyes without spring, per pair, . . . . . . . 9 00 to 20 00 1319. Eye-glasses, solid gold, round eyes, without spring, . . 7 00 to 15 00 1320. Do. do. do. with spring to clasp the nose, 5 00 to 15 00 1321. Do. do. oval eyes, with spring to clasp the nose, 5 00 to 15 00 1322. Eye-glasses, hard vulcanite frame, round eyes, double convex glasses, per pair, 1 00 1323. Eye-glasses, hard vulcanite frame, round eyes, double concave glasses, per pair, 1 00 1324. Eye-glasses, hard vulcanite frame, round eyes, arch spring, double convex glasses, per pair, 1 00 1325. Eye-glasses, hard vulcanite frame, round eyes, arch spring, double concave glasses, per pair, 1 00 1326. 1332. 1326. Eye-glasses, hard vulcanite frame, arch spring, oval eyes, double con- vex glasses, per pair, 1 00 1327. Eye-glasses, hard vulcanite frame, arch spring, oval eyes, double con- cave glasses, per pair, 1 00 1328. Eye-glasses, shell frame, oval eyes, double convex glasses, per pair, 2 00 1329. Do. do. do. do. concave glasses, do. 2 00 1330. Do. steel frame, do. do. convex glasses, do. 1 25 1331. Do. do. do. do. concave glasses, do. 1 25 1332. Do. shell frame, do. three springs, double convex glasses, per pair, 2 50 1333. Eye-glasses, shell frame, oval eyes, three springs, double concave glasses, per pair, 2 50 1334. 1334. Eye-glasses, very light steel frame, oval eyes, three springs, double convex or double concave glasses, per pair, 2 00 SPECTACLE CASES. 11 1335. No. Prick. 1335. Eye-glasses, extra light steel frame, oval eyes, three spTing3, double concave glasses, per pair, $>2 5# 1340. 1341, 1340. Wire Gauze Eye Protectors, with green, blue, smoke or white glasses, and elastic band ; an excellent article for railroad travelling, per pair, 50 1341. Wire Gauze Eye Protectors, with green, blue, smoke or white glasses, and steel sides, as spectacles, per pair, 1 50 1342. Silk Shades, with elastic bands, for weak eyes, each, . . . 1 00 1343. Artificial Human Eyes, a large assortment of sizes and colors, each, . 15 00 SPECTACLE GLASSES 1350. Convex, White per pair, 75 1351. Do. Cataract, per pair, - . 1 25 1352. Do. Periscopic, per pair, 75 1353. Do. Green, Blue, or Smoke, per pair, 1 50 1354. Do. Divided glasses, per pair, 1 50 1355. Concave, White, from 6 to 36 inch focus, per pair, .... 75 1356. Do. do. 1 to 6 do. add 10 cents per number, 1357. Do. Periscopic, per pair, ........ 1 00 1358. Do. Green, Blue, or Smoke, per pair, . . . . . . 1 50 1359. Plain, Green, Blue, or Smoke, per pair, 1 00 1360. Pebbles, Convex, per pair 4 00 1361. Do. Concave, per pair, 4 00 OF BEST QUALITY, FITTED TO FRAMES AT THE FOLLOWING PRICES: SPECTACLE CASES. 1362. Morocco, each, ...... 25 1363. Planished Tin, each, 25 1364. German Silver Plated, each, . , . . . . $1 25 to 1 75 1365. Papier Mach6, each, . . . , . . . . . 50 to 1 50 1366. Silver, each, $8 00 to 15 00 The Prices attached to the Spectacles in the foregoing list are what they will cost with the usual Convex Glasses, unless where otherwise specified. They will cost more with high numbers of Convex or Concave, Cataract, Green or Blue Convex or Concave, and Periscopic Glasses, or with Pebbles. SELECTION OF SPECTACLES. TO DEALEES. The prices given on pages 5 to 10, for Spectacles, Eye-glasses, &c., are our lowest retail prices. Dealers who buy Spectacles to retail again, will find our prices by the dozen very low indeed, and they can always have the dozens made up of any Sights they may happen to be in want of; the advantage of which is that they will never get too many of any one number, while they have none of some very important numbers. We have Steel Spectacles, from $1 50 per dozen to $25 per dozen. Eye-glasses, from $3 50 to $20 per dozen. To select Spectacles for improving the Sight when age is the cause of the failure. At the age of forty, most ladies begin to experience some difficulty in threading a fine needle and reading very fine print, but gentlemen do not notice this change until about' the age of fifty. These ages do not hold good in all cases, but as an average they can be relied upon. Among the indications that the eyes are beginning to be impaired by age, and that spectacles are. required, are, the necessity of putting a book farther from the eyes than a natural distance in order to read fine print distinctly, a greater care to have a strong light upon the reading or sewing; as, for instance, going close under the window or holding the light between the eyes and the reading, on looking at a near object, in a short time it becomes confused and appears to have a kind of a mist before it, and the letters of a book run one into another or appear double, and after a little use the eyes have an over-taxed wearied feeling. In selecting Spectacles to remedy these defects of vision, it is desirable to consult an experienced Optician, and with his advice and assistance to procure those best suited to the condition of the eye. But in case an Optician is not readily accessible, persons wanting Spectacles, instead of picking up and using any kind that may happen to be at hand, regardless of the power and quality of the glasses, would do well to send to us for a pair; and if the following data is carefully given us, we will have no difficulty in sending Spectacles to suit the sight:—The age of the person ; and state, if lady or gentleman, whether spectacles have been worn ; if not, give the number of inches— very small printing must be held from the eyes in order to read it distinctly in a good light—and send a sample of the printing: but if Spectacles have been worn, send a glass or piece of a glass from the Spectacles last worn; state the age and sex of the person; how long the last pair of Spectacles had been used, and at what number of inches from the eyes with these Spectacles on very small printing must be held in order to see it distinctly, and send sample of the printing. Persons after having used Spectacles for ten or twelve years to assist them in read- ing, begin to notice a change in their sight with regard to distant objects, a little want of clearness. When Spectacles are wanted to remedy this defect, if a glass from a pair of Spectacles which suits for reading small printing is sent us, we can send a pair of Spectacles that will correct the defect, and give clear vision for distant seeing. Near-sighted persons or those who db not wear glasses to assist them in reading, yet are unable to see distant objects clearly, in order to have the proper glasses sent them, should give us the number of inches they are obliged to hold very small print- ing from their eyes, and send, sample of the printing. Colored glasses—blue, green and smoke* may be worn to protect the eyes from in- tensely bright light, such as sunshine, or blazing fire—but it is not advisable to use them for reading or working; the habitual using of them, where there is only a mod- erate light, is found to have an injurious effect in rendering the eyes too sensitive. Spectacles can be transmitted through the mail with safety to and from us. The postage on a single pair is nine cents. All orders for Spectacles will receive our prompt and careful attention. And if those sent are not found to be quite right, they will be exchanged for others without additional cost. In ordering Spectacles, it will only be necessary to give the catalogue number of the kind' wanted and the information about the sight before alluded to. To select Spectacles for ITear or Short-Sighted Persons. SPY GLASSES AND TELESCOPES. ACHB0MATI0 SPY-GLASSES AND TELESCOPES. 1375. 1385. 1388. 1393. No. 1375. Achromatic Spy-glass, with wood body, and three draws, 15 inches long when drawn out, 6 inches long when shut up ; object-glass 1 inch in diameter. Power 15 times, $3 00 1376. Achromatic Spy-glass, with wood body, and three draws, 16 inches long when drawn out, 6 inches long when shut up; object-glass If inches diameter. Power 20 times, 4 00 1377. Achromatic Spy-glass, with wood body, and three draws, 23 inches long when drawn out, 8 inches long when shut up; object-glass If inches in diameter. Power 25 times, . . .... 6 00 1378. Achromatic Spy-glass, with wood body and three draws, 30 inches long when drawn out, 10 inches long when shut up ; object-glass If inches diameter. Power 30 times, 8 00 1379. Achromatic Spy-glass, with wood body and four draws, 37 inches long when drawn out, 11 inches long when shut up ; object-glass If inches diameter; a very superior glass. Power 35 times, . . . . 14 00 1380. Achromatic Spy-glass, with wood body, and four draws, 42 inches long when drawn out, Ilf inches long when shut up ; object-glass 2f inches in diameter, with sun-glass. Power 40 times, . * . 25 00 1381. Achromatic Spy-glass, with wood body, and four draws, 48 inches long when drawn out, 13f inches long when shut up ; object-glass 2f inches diameter, with sun-glass. Power 50 times, . . . . 36 50 Price. 14 No. TOURrST’ff SPY-GLASS E-S. Price. 1382. Achromatic Spy-glass, with wood-body, and five draws, 28' inches long when drawn out, 7$ inches long when shut up ; object-glass If inches diameter; about the same power as No. 1378, but more portable. Power 35 times, .. . , , . . . . , . . $12 00 1383. Achromatic Spy-glass, with wood body and six draws, 17 inches long when drawn out, 4f inches long when shut up ; object-glass If inches diameter. Power 20 times, , . . . - . 6 50 1384. Achromatic Spy-glass, with wood body and six draws, 16 inches long when drawn out, 4f inches long when shut up ; object-glass f inch diameter; a very portable pocket spy-glass. Power 15 times, . . 6 00 1385. Achromatic Spy-glass, brass body, covered with cord or leather; has shade to keep off the sun and rain; one draw, 36 inches long when drawn out, 20 inches long when shut up ;- object-glass If inches diameter. Power 25 times, ...... . 13 00 1386. Same as 1385, but with two or three draws ; 15 inches long when shut up, ,, ... 13 00 1387. 1389. 1387. Rifle Spy-glasses, lOf inches long;- object-glass f inch diameter,. . 3 00 1388. Naval Achromatic Spy-glass, tapering wood body and one draw, 55 in- ches long when, drawn out, 45 inches long when shut up ; rack and pinion fox adjusting the focus. Power 50 times, . . . . 45 00 1389. Tourist’s Achromatic Spy-glass, with brass body, covered with black Turkey morocco; three draws, 17 inches long when drawn out, 6 in- ches long when shut up ; object-glass 1} inches diameter; sun shade to slip beyond the object-glass; heavy leather caps to cover both the eye-glass and object-glass; strong leather strap to sling over the shoulder. Power 20 times, ' 12 00 1390. Same as No. 1389,' but is 21 inches long when drawn out, 7 inches long when shut up ; object-glass 1| inches diameter. Power 25 times, 15 50 1391. Same as No. 1389, but is 24 inches long when drawn out, 9 inches long when shut up ; object-glass If inches diameter. Power 30 times, . 21 00 1392. Same as 1389, but has four draws, and is 36 inches long when drawn out, 10 inches long when shut up ; object-glass If inches diameter. Power 35 times, ........... 30 00 1393. Wooden Tripod Stand, with vertical and horizontal motion, upon which to place a spy-glass; an exceedingly useful article, as a glass of much power cannot be held in the hand with sufficient steadiness to produce the best effect, ......... 7 00 1394. Brass Clamp with Gimlet Screw, to fasten a spy-glass to a post or tree, 3 50 ASTRONOMICAL TELESCOPES. 15 ASTRONOMICAL TELESCOPES. 1395. No. Price. 1395. Astronomical Telescope. Body all brass on highly finished brass tripod stand, rack adjustment for focus, object-glass 2 inches in diameter, one terrestrial and one celestial eye-piece ; packed in a strong walnut w-ood case, with lock and key, ........ $65 00 1396. The same instrument, with object-glass 2J inches in diameter, and sun- glass, 100 00 1397. The same, with object-glass 3 inches in diameter, two celestial and two terrestrial eye-pieces, . . ..... 175 00 1398. The same, with object-glass 3| inches in diameter, and three celes- tial eye-pieces, . . . . . . ' . . . . 250 00 1399. The same, with object-glass 4 inches in diameter, . . 500 00 Instruments of larger sizes imported to order. The object-glasses of all our Telescopes are achromatic, and of the best quality. 16 ASTRONOMICAL TELESCOPES. ASTRONOMICAL TELESCOPES. 1400. 1405. No. Price. 1400. Astronomical Telescope, body and movements all brass, with rack adjustment for focus, object-glass 2 inches diameter, one terrestrial and one celestial eye-piece, and sun-glass, packed, in strong walnut wood case, with lock and key. The body is mounted upon a firm tripod stand of mahogany, affording every facility for observation, $55 00 1401. The same with object-glass inches diameter, . . . . 85 00 1402. The same with object-glass 3 inches diameter, 150 00 1403. The same with object-glass inches diameter, 225 00 1404. The same with object-glass 4 inches diameter, ..... 375 00 1405. Astronomical Telescope, similar in size and mounting to 1400, but rather more portable, object-glass 3 inches diameter, two terrestrial and one celestial eye-piece, sun-glass, packed in strong walnut case, with lock and key, 175 00 1406. The same with object-glass 31 inches diameter, and two celestial eye- pieces, ............ 250 00 1407. The same with object-glass 4 inches diameter, ..... 400 00 ASTRONOMICAL TELESCOPES. 17 ASTRONOMICAL TELESCOPES. 1410. No. 1410. Astronomical Telescope, body and movements all brass, with most complete movements by Bagnettes, rack work for adjustment of focus. The stand is a tripod of highly finished mahogany, very strong and firm, with rack work for adjusting the instrument at any desired height, object-glass 3 inches diameter, two terrestrial and two celestial eye-pieces, and sun-glass, in a strong walnut case, lock, ............ $350 00 1411. The same instrument with object-glasa 3£ inches diameter, and three celestial eye-pieces, ........ . . 500 00 1412. The same instrument with object-glass 4 inches diameter, and four celestial eye-pieces, 600 00 Any of the foregoing instruments can be supplied with finders at an additional cost of $25. 1413. Terrestrial eye-pieces for Telescopes made to order of any power, . 18 00 1414. Celestial eye-pieces for Telescopes made to order of any power, . 12 00 1415. Sun-glasses for eye-pieces, 2 00 Prick. 18 READING AND PICTURE LENSES. READING AND PICTURE LENSES, 1424. 1440. No. 1420. Reading Glass, hard rubber frame, double convex lens, \ inch diameter, $0 35 1421. Do. do. do. 1$ do. 85 1422. Do. do. do. 2 do. 1 50 1423. Do. do. do. do. 3 00 1424. Reading Glass, oxidized metal frame, double convex lens, 2 do. 1 09 1425. Do. do. do. do. 2J do. 1 50 1420. Do. do. do. do. 3 do. 2 00 1427. Do. do. do. do. 3j do. 2 50 1428. Do. do. do. do. 4 do. 3 25 1429. Do. do. do. do. 4£ do. 4 50 1430. Do. do. two plano-convex lenses, 2| in. diam., 2 25 1431. Do. do. do. do. 3 do. 3 00 1432. Do. do. do. do. 3J do. 4 25 1433. Do. do. do. do. 4 do. 5 00 1434. Reading Glass, gilt metal frame, ivory handle, one double convex lens, 2 inches diameter, 2 25 1435. Reading Glass, gilt metal frame, ivory handle, one double convex lens, 2£inches diameter, .......... 2 75 1436. Reading Glass, gilt metal frame, ivory handle, one double convex lens, 3 inches diameter, . 3 75 1437. Reading Glass, gilt metal frame, ivory handle, double convex lens, 4 inches diameter, ........... 5 50 1438. Reading Glass, gilt metal frame, ivory handle, double convex lens, 4i inches diameter, ........... 7 00 1439. Reading Glass, gilt metal frame, ivory handle, double convex lens, 5 inches diameter, 8 50 1440. Reading Glass, black metal frame, wood handle, double convex lens, 3 inches long by inches .wide, ........ 1 50 1441. Reading Glass, black metal frame, wood handle, double convex lens, 3} inches long by If inches wide, ........ 2 00 1442. Reading Glass, black metal frame, wood handle, double convex lens, 4 inches long by 2 inches wide, ... ..... 2 50 1443. Picture Glasses, -wood frames and handle, double convex lens 5 inches diameter, 5 00 1444. Picture Glasses, wood frame and handle, double convex len& 6 inches diameter, 7 00 Prick. MARINE AND FIELD GLASSES. 19 ACHE0MATI0 MAEINE, HELD AND 0PEEA GLASSES. Opera Glasses are designated and priced according to the diameter of the object- glasses in French lines, a3 follows : 11 Lines, which is equal to 1 inch. 13 Do. do. 1T inches. 15 Do. do. 1T inches. 17 Do. do. l| inches. 19 Do. do. l|| inches. 21 Do. do. l| inches. 24 Do. do 2} inches. 26 Do. do. inches. The power and sharpness of definition of an Opera Glass depends upon the diam- eter of the object-glass, the greater the diameter the higher the power, and more clearly distant objects are seen. MABINE AND HELD GLASSES. 1448. No. 1448. U. S. Army Signal Service Six Lens Achromatic Field Glass, metal body, covered with Turkey morocco, sun shade to extend over the object-glasses, and heavy leather case, with strap ; very superior. Body 54 inches long; object-glasses 21 lines in diameter, . . $17 00 Do. &$■ do. do. 24 do. . . 20 00 Do. 6j do. do. ' 26 do. . . 22 00 Price. 20 OPERA GLASSES 1448. Price. No. 1450. Six Lens Achromatic Opera Glasses, metal body, japanned black, Body 2 inches long; object-glasses 11 lines in diameter, each, . $4 00 Do. 2J- do. do. 13 do. do. . . 4 50 Do. 3 do. do. 15 do. do. . . 5 25 Do. 3£ do. do. 17 do. do. . . 5 75 Do. 4 do. do. 19 do. do. . . 6 50 Do. 4J- <}o. do. 21 do. do. . . 8 00 Do. 4£ do. do. 24 do. do. . . 9 50 Do. 5 do. do. 26 do. do. . . 11 50 1451. Six Lens Achromatic Opera Glasses, metal body, japanned black, Body 2J inches long; object-glasses 13 lines in diameter, each, . 5 25 Do. 2J do. do. 15 do. do. . . 5 75 Do. 3 do. do. 17 do. do. . . 7 00 Do. 3J do. do. 19 do. do. . . 8 50 Do. 3| do. do. 21 do. do. . . 9 50 Do. 4 do. do. 24 do. do. . . 12 00 1452. Six Lens Achromatic Opera Glasses, metal body, covered with black imitation Turkey morocco. Body 2 J inches long ; object-glasses 13 lines in diameter, each, 5 00 Do. 3 do. do. 15 do. do. . « 5 50 Do. 3£ do. do. 17 do. do. . . 6 00 Do. 4 do. do. 19 do. do. . . 7 00 Do. 4J do. do. 21 do. do. . . 8 25 Do. 4} do. do. 24 do. do. . . 10 25 Do. 5 do. do 26 do. do. . . 12 00 1453. 1454. 1453. Six Lens Achromatic Opera Glasses, metal body, covered with black imitation Turkey morocco. Body inches long; object-glasses 13 lines in diameter, each, • 5 50 Do. 2J do. do. 16 do. do. . 6 00 Do. 3 do. do. 17 do. do. . 7 00 Do. 3\ do. do. 10 do. do. . . 8 75 Do. 3J do. do. 21 do. do. . 10 25 Do. 4 do. do. 24 do. do. . . 12 50 OPERA GLASSES. 21 No. 1454. Six Lens Achromatic Opera Glasses, metal body, covered with black imitation Turkey morocco, the bars connecting the two bodies curved, and every part very substantially made. Body 2} inches long; object-glasses 13 lines in diameter, each, . $ 8 25 Do. 2J do. do. 15 do. do. . . 10 50 Do. 3 do. do. 17 do. do. . . 11 00 Do. 3j do. do. 19 do. do. . 12 75 Do. 3j do. do. 21 do do. . 14 75 Prick. 1455. 1457. 1455. Twelve Lens Achromatic Opera Glasses, metal body, covered with black imitation Turkey morocco ; very superior. Body inches long; object-glasses 13 lines in diameter, each, . 13 00 Do. 2J do. do. 15 do. do. . 14 00 Do. 3' do. do. 17 do. do. . 16 50 Do. 3\ do. dp. 19 do. do. . . 18 00 Do. 3J do. do. 21 do. do. . 19 50 1456. Six Lens Achromatic Opera Glasses, metal body, covered with fancy colored imitation Turkey morocco; tubes and cross pieces gilt. Body inches long; object-glasses 13 lines in diameter, each, . 5 25 Do. do. do. 15 do. do. . . 5 75 Do. 3 do. do. 17 do. do. . . 6 50 Do. 3£ do. do. 19 do. do. . . 7 50 Do 3£ do. do. 21 do. do. . . 9 00 1457. Same as No. 1456, but more substantially and carefully finished. Body 2} inches long; object-glasses 13 lines in diameter, each, . 8 75 Do. do. do 15 do. do. . 9 00 Do. 3 do. do. 17 do. do. . . 10 50 Do. 3} do. do. 19 do. do. . . 12 00 Do. 3| do. do. 21 do. do. . . 13 00 1458. Same as No. 1457, but has the tubes and cross pieces japanned black. Body 2\ inches long; object-glasses 13 lines in diameter, each, . 7 75 Do. 2j do. do. 15 do do. . . 8 25 Do. 3 do. do. 17 do. do . . 9 50 Do. 3J do. do. 19 do. do. . . 11 25 Do. 3J do. do. 21 do. do. . . 12 50 1459. Six Lens Achromatic Opera Glasses, metal body, covered with fancy colored imitation Turkey morocco, gilt tubes, and curved gilt cross pieces; very fine. Body 2£ inches long; object-glasses 13 lines in diameter, cacn, . 11 50 Do. 2£ do. do. 15 do. do. . . 13 00 Do. 3 do. do. 17 do. do. . . 15 00 Do. 3J do- do. 19 do. do. . . 17 00 Do. 3£ do.. do. 21 do. do. . . 20 00 22 No. OPERA GLASSES. Prick. 14G0. Six Lens Achromatic Opera Glasses, metal body, covered with fancy colored imitation Turkey morocco, with gilt Grecian border, gilt tubes, curved cross pieces ; very superior. Body inches long; object-glasses 13 lines in diameter, each, . $15 00 Do. 2£ do. do. 15 do. do. . . 16 25 Do. 3 do. do. It do. do. . . It 00 Do. 3\ do. do. 19 do. do. . 18 50 Do. 3£ do. do. 21 do. do. . 21 00 14C1. Same as No. 1460, but with black japanned tubes. Body 2J inches long; object-glasses 13 lines in diameter, each, . 12 25 Do. 2| do. do. 15 do. do„ . . 13 50 Do. 3 do. do. 17 do. do. . . 15 00 Do. 3\ do. do. 19 do. do. . 16 25 Do. 3J do. do. 21 do. do. . . 19 50 1462. Six Lens Achromatic Opera Glasses, metal body, covered with black Turkey morocco, gilt tubes, curved cross pieces; very superior. Body 2j inches long; object-glasses 13 lines in diameter, each, . 11 50 Do. 2£ do. do. 15 do. do. . . 12 25 Do. 3 do. do. It do. do. . . 13 50 Do. do. do. 19 do. do. . 15 00 Do. 3J do. do. 21 do. do. . . 18 00 1463. Same as No. 1462, but has twelve Lenses. Body 2J- inches long; object-glasses 13 lines in diameter, each, . 15 00 Do. do. do. 15 do. do. . 16 50 Do. 3 do. do. It do. do. . . 18 50 Do. 3} do. do. 19 . do. do. . v 21 00 Do. 3£ do. do. 21 do. do. . . 24 00 1464. Six Lens Achromatic Opera Glasses, metal body, oxidized gray, gilt tubes, curved cross pieces; very superior. Body 2J inches long; object-glasses 13 lines in diameter, each, . 16 25 Do. 2J do. do. 15 do. do. . It 00 Do. 3 do. do. It do. do. . 18 50 Do. 3\ do. do. 19 do. do. . 20 00 Do. 3| do. do. 21 do. do. . 22 50 1465. Six Lens Achromatic Opera Glasses, metal body, covered with blue Turkey morocco, white pearl tops, gilt tubes, cross pieces curved and gilt. Body 2\ inches long; object-glasses 13 lines in diameter, each, . 21 00 Do. 2£ do. do. 15 do. do. . 23 00 Do. 3 do. do. It do. do. . 2t 00 Do. 3} do. do. 19 do. do. . 28 00 Do. 3| do. do. 21 do. do. . 31 00 1466. Six Lens Achromatic Opera Glasses, white pearl body, gilt tubes and cross pieces, low eye-pieces. Body l£ inches long; object-glasses 13 lines in diameter, each, . 13 50 Do. 2} do. do. 15 do. do. . . 14 t5 Do. 2| do. do. • do. do. . 17 00 Do. 2§ do. do. 19 do. do. . 21 00 Do. 2g- do. do. 21 do. do. . 25 00 Do. 3| do. do. 24 do. do. . . 31 00 1467. Six Lens Achromatic Opera Glasses, white pearl body, gilt tubes and cross pieces, raised eye-pieces. Body 2| inches long; object-glasses 13 lines in diameter, each, . 19 00 Do. 3 do. do. 15 do. do. . . 20 00 Do. 3} do. do. 17 do. do. . . 23 00 Do. 3| do. do. 19 do. do. . . 27 00 Do. 3| do. do. 21 do. do. . . 31 00 Do. 41 do. do. 24 do. do. . . 38 00 STEREOSCOPES. STEEE0SC0PES. No. 1492 to 1496. 1499 to 1501. 1502 and 1503 Phice. 1490. Holmes’ Stereoscope, walnut frame ; round paper shield, each, . . $1 25 1491. Do. do. do. square walnut shield, each, . 1 50 1492. Do. do. do. round cloth do. do. . 1 75 1493. Do. do. do. do. morocco do. do. . 2 25 1494. Do. do. do do. rosewood do. do. . 2 50 1495. Do. do. do. do. velvet do. do. . 2 50 1496. Do. do. mahogany frame; round mahogany shield, each, 3 00 1497. Do. do. rosewood frame; square rosewood do. do. 3 50 1498. Do. do. do. round do. do. do. 4 00 1499. Stand for holding any of the above, in walnut, 1 50 1500. Do. do. do. mahogany, . . . . 1 75 1501. Do. do. do. rosewood, . . . . 2 00 1502. Beck’s Patent Achromatic Mirror Stereoscope; mahogany, . . 15 00 1503. Do. do. do. walnut, . . 1 17 50 1504. Beck’s Patent Achromatic Table Stereosoope ; mahogany, . . . 25 00 1505. Do. do. do. do. walnut, . . . 30 00 1506. Do. do. do. walnut or mahogany; extra finish, ........... 50 00 1507. Beck’s Cabinet Stand for Table Stereoscope, fitted up to hold the in- strument and slides ; in mahogany or walnut, 35 00 1508. The same, of very finest finish, . 70 00 1509. Beck’s Pedestal Stand, fitted up to hold the instrument and slides ; in mahogany or walnut, . . . ...... 25 00 1504 to 1506. 1509. 24 No. STERE08COPES AND VIEWS. Pric*. 1510. Leather Case to hold 1502 or 1503, and a few views, . . . . $5 00 1511. Cottage Stereoscope, in plain black walnut, with one set of lenses on top, that swing so as to view the pictures on either side of the axle ; revolving chain to hold 48 paper views, 15 00 1512. Library Stereoscope, 18 inches high, in highly finished black walnut, with one set of lenses, and revolving chain to hold 72 glass or paper pictures, 30 00 1513. The same as 1512, in rosewood 35 00 1515. 1516. 1514. The same as 1512, but with two sets of lenses, and revolving chain to hold 72 glass or 144 paper pictures, . 35 00 1515. Parlor Stereoscope, in select rosewood, with improved shutter, and two sets of lenses to hold 72 glass or 144 paper pictures, . . . 45 00 1516. Parlor Stereoscope, in finest French walnut, or select rosewood; arched top, inlaid with gilt; ornaments very chaste; for 72 or 100 pictures, 60 00 1517. The same, for 100 and 200 pictures, 70 00 1518. Boudoir Stereoscope, in select rosewood; four feet high, on castors, with two sets of lenses, and revolving chain to hold 150 glass or 300 paper pictures, 105 00 1519. The same as 1518, but will hold 300 glass or 600 paper pictures, . 140 00 1520. Brass Stand to hold either 1502 or 1503 10 00 STEREOSCOPIC PICTURES. We have constantly on hand, and are receiving daily, an endless variety of views of all the most important cities and public buildings in the world, with every variety of landscape views in all regions. Statuary, monuments, colored groups from life, and celebrities, male and female. These range in price from $1.00 to $6.00 per dozen for paper pictures, and from 75 cts. to $3.00 each for glass. The former can be sent safely by mail. A detailed and priced list will be sent to any address on receipt of stamp. CLAUDE LORRAINE MIRRORS, ETC. CAMEEA 0BSCURAS, CAMERA LUCIDAS, &c., &c. 25 1530. 1533. 1534. No. 1530. Diagonal Mirror, with convex lens; for viewing perspective prints, each, $3 50 1531. Pictures for the above; views in Switzerland, France, America, &c., per dozen, 1 50 1532. Plain Camera Obscura. In this the object is beautifully represented on a piece of ground glass about six inches square, affording a pleasing amusement to young persons, as representing a moving panorama of animated nature ; neat walnut box, 8 00 1533. Camera Obscura Head or Lens, without box; a prismatic lens, mounted with brass. This is the best kind of lens for a Camera Obscura, as it forms both lens and mirror, each, ... $6 50, $9 00, and 10 50 1534. Improved Camera Obscura. This is recommended as the best drawing apparatus yet introduced: it is light and portable, and can be used to satisfaction by persons, entirely unacquainted with drawing, each, 20 00 1535. Camera Lucida, with one draw, ........ 6 50 1536. Camera Lucida, with two draws, lenses for defective sight, and printed instructions, 16 00 Prior. CLAUDE L0EBAINE, or LANDSCAPE MIEE0B. Claude Lorraine, or Landscape Mirror. A pleasing and beautiful instrument, for viewing clouds, landscapes, &c.; particularly adapted for use in the country and at the sea-shore. As the mirror condenses or diminishes the view into a true perspective effect, the instrument is invaluable to the artist, and a very desirable companion for tourists. The mirror produces, instantaneously, the most charming reflection of scenery, buildings, &c., 6 sizes, as follows: 1540. Mirror, 6J- inches long by 5J inches wide, in strong morocco case, each. 6 25 1541. Do. 7£ do. do. do. do. 7 50 1542. Do. 7£ do. do. do. do. 8 75 1543. Do. 8| do. do. do. do. 10 00 1544. Do. 8| do. 7J do. do. do. 11 25 1545. Do. 9J do. 7£ do. do.. do. 12 50 26 ZOETROPE AND ENTOMOLOGICAL PINS. No. MIEBOES, IN BLACK WOOD FEAMES. Price. 1547. Magnifying on one side, diminishing on the other, 6 inches diameter, each, $3 00 1548. Cylindrical (elongating and shortening), 6 inches diameter, each, . 2 50 1549. Multiplying (producing several images), 6 inches diameter, each, . 2 50 1550. Magnifying on one side, plane on the other, inches diameter, each, 75 1551. Do. v do. do. 5 do. do. 1 25 1552 Do, do. do. 6 do. do 2 00 OPTICAL TOYS. 155G. 1558. 1553. Kaleidoscopes, to hold in the hand, each, . . . . . 75 to 1 50 1554. Do. on stand, small size, each, ...... 4 00 1555. Do. do. medium size, with spokes, each, . . . 4 50 1556. Do. do. large size, with spokes; brass fronts, each, 5 00 1557. Anamoscope; or, Pillar and Twelve Distorted Pictures, which regain their true appearance when the reflection is seen on the pillar, . 2 50 1558. Zoetrope, or Wheel of Life, 3 50 A mechanical and optical toy, affording amusement to old and young. It is an exemplification of the science of optics, and is a valuable aid in illustrating that department of natural philosophy. The turning of the drum or cylinder brings into view the varying form or position of a figure in rapid succession, until they blend into a perfect image full of motion, and producing natural action. By placing the apparatus in a suitable light, a number of persons can ex- amine it at the same time. Extra views for Zoetrope, per set of six, ...... l 00 1559. Zoetrope, small size, 1 50 1560. Entomological Pins, German make, 1 £ inches long, five sizes of wire, per 100 15 Do. do. do. per 1000, 1 25 1561. Entomological Pins, English, | to 1 inch long, various sizes, per 100, . 10 to 40 1562. Entomological Cabinet, bound in book form, . . . . . . 1 50 Orders for Pins must be accompanied by a svfjficienNcemittance to cover the Postage. A sheet of samples will be sent for ten cents ENTOMOLOGICAL PINS. 15G0. MICROSCOPES. THE MICROSCOPE. Within the last few years, the microscope has become so firmly rooted among us, that little need be said in its praise. The time has long passed away when it was held in no higher estimation than an ingenious toy} but it is now acknowledged that no one can attain even a moderate knowledge of any physical scienc« without a con- siderable acquaintance with the microscope and the marvellous phenomena which it reveals. The geologist, the chemist, the mineralogist, the anatomist, or the botanist, all find the microscope a useful companion and indispensable aid in their interesting and all-absorbing researches, and, with every improvement in its construction, have discovered a corresponding enlargement and enlightenment of the field displayed by the particular science which they cultivate. But even to those who aspire to no scientific eminence, the microscope is more than an amusing companion, revealing many of the hidden secrets of nature, and unveiling endless beauties which were heretofore enveloped in the impenetrable obscurity of their own minuteness. No one who possesses even a pocket-microscope of the most limited powers can fail to find amusement and instruction even though he was in the midst of the Sahara itself. There is this great advantage in the microscope, that no one need feel in want of objects as long as he possesses his instrument and a sufficiency of light. Many persons who are gifted with a thorough appreciation of nature in all her vivid forms are debarred by the peculiarity of their position from following out the impulses of their beings, and are equally unable to range the sea-shore in search of marine creatures or to traverse the fields and woods in the course of their investigations into the manifold forms of life and beauty which teem in every nook and corner of the country. Some are confined to their chambers by bodily ailments, some are forced to reside within the very heart of some great city, without opportunities of breathing the fresh country air more than a few times in the course of the year} and yet there is not one who may not find an endless series of Common Objects for his microscope within the limits of the tiniest city chamber. So richly does nature teem with beauty and living marvels, that even within the closest dungeon-ivalls a never failing treasury of science may be found by any one who knows how and where to seek for it. There is little doubt but that if any one with an observant mind were to set him- self to work determinedly merely at the study of the commonest weed or the most familiar insect, he would, in the course of some years’ patient labor, produce a work that would be most valuable to science and enrol the name of the investigator among the most honored sons of knowledge. There is not a mote that dances in the sunbeam, not a particle of dust that we tread heedlessly under our feet, that does not contain within its form mines of knowledge as yet unworked. For if we could only read them rightly, all the records of the animated past are written in the rock's and dust of the present. Microscopes may be divided into two classes, simple and compound. The former class may contain several lenses or glasses, but generally consists of a single lens ; but the Compound Microscope must consist of at least two glasses, the one near the object to be examined, and commonly called the objective, the other near the eye, and called the eye piece. This class is subdivided into Monocular and Binocular instru- ments, in which the object is viewed with one or both eyes, as their names imply. The instruments enumerated in the following Catalogue are arranged under these several heads, beginning in each with the simple and inexpensive forms, and leading up to the most perfect yet devised by skill and science. We have of each kind always in stock so that we can fill orders without any vexatious delays, and our customers may depend upon having all mail orders attended to with as much care as though they made a personal selection for themselves. 28 SIMPLE MICROSCOPES SIMPLE MICEOSCOPES TO FOLD IE OASES. 1600. 1610. 1615. 1619. 1623. No. 1600. Hard rubber case and frame round form, 1 double convex lens, f in diam. $0 50 1601. Do. do. do. 1 do. 1 do. 75 1602. Do. do. do. 1 do. do. 1 00 1603. Do. do. do. 1 do. l£ do. 1 25 1604. Do. do. ' do. 1 do. 1J do. 1 50 1605. Do. do. do. 1 do. 2 do. 2 25 1606. Do. do. do. 2 do. f do. 75 1607. Do. do. do. 2 do. 1 do. 1 25 1608. Do. do. do. 2 do. lj do. 2 00 1609. Do. do. do. 2 do. 1.] do. 2 50 1610. Do. do. bellows form 1 do. f do. 75 1611. Do. do. do. 1 do. 1 do. 1 00 1612. Horn case, orass frame, do. 1 do. f do. 85 1613. do. do. do. 1 do. 11 do. 1 25 1614. do. German silver frame1, do. 1 do. f do. 1 00 1615. Hard rubber case and frame,. do. 2 do. | do. 1>00 1616. do. do. do. 2 do. 1 do. 1 25 1617. Horn case,, brass frame, do. 2 do. do. 1 25 1618. do. German silver frame, do. 2 do. J do. 1 50 1619. Hard rubber case and frame, do. 3 do. £ do. 1 50 1620. do. do. do. 3 do. 1 do. 1 75 1621. Horn case; brass frame, do. 3 do. f do. 1 75 1622. do. German silver frame, do. 3 do. f do. 2 00 1623. Horn case and frame, 1 double convex lens, J inch diameter, of high power at one end, and 1 double convex lens £ inch diameter of medium power at the other end, 1 50 1625. Linen Provers or Microscope, to count the threads in linen fabrics, brass frame, 50 1626. The same, German silver frame, ........ 75 1627. Do- do. do. and achromatic lens,. . . . 1 25 Price. SIMPLE MICROSCOPES. WATOHMAKEB’S AND ENGBAVEB’S GLASSES. 1630. 1631. No* Prick. 1630. Watchmaker’s Glass, horn frame, 1 double convex lens, J inch diameter, $0 40 1631. Watchmaker’s Glass, horn frame, 2 double convex lens, | inch diameter, very high power,........... l 00 1632. Engraver’s Glass, horn frame, 1 double convex lens, 1 inch diameter, 50 1633. Do. wood frame, 1 do. do. If do. 50 1634. Do. horn frame, 2 plano-convex lenses, lj do. I \>0 1635. Do. do. do. do. 2 da 1 50 1636. Microscope, with glass cage for seeds or live bugs, small size, . . 1 00 1637. Do. do. do. do. large size, . . 1 50 1638. Jointed Microscope, for flowers and insects; folds to carry in the pocket, 2 25 1632. 1634. 1636. 1638. 1639. 1640. 1645. 1625. 1639. Microscope on Three Legs, all brass, with screw adjustment for focus, 1 CO 1640. Microscope on Three Legs, hard rubber frame, . . . . . 1 00 1642. Coddington Lens, brass frame, three sizes, . . $1 50, $2 00 and 2 50 1643. Do. silver frame, ........ 2 50 1644. Do. do. with cover, . . . . . . 3 50 1645. Do. do. do. inch focus, very fine, . 9 00 1646. Do. large size, with cover, plated, . . . . . 4 50 1647. Do. do. do. do. and engraved,. . . 5 50 1648. Do. do. do. gilt, and engraved . . 6 50 1643. 1642. 1647, 30 WIMPLE MICROSCOPES. No. 1649. The Child’s Microscope, . . . . $3 50 This simple, compact and perfect little instrument meets a want long felt, namely, that of a really good and efficient Micro- scope, at an extremely low price, and adapted by its simplicity to the under- standing of a child. The magnifiers or lenses are three in number, and can be used separately or com- bined. With the lowest power, or largest single lens, a large insect, such as a bee or fiy, can be examined without any fur- ther preparation than plac- ing it in the insect box wh»ch accompanies the instrument. With the three lenses combined, a power of 700 times can be obtained, which is quite sufficient to show many of the larger animalculse in pond or ditch water, the scales from a butterfly’s wing, pollen grains of plants, and thousands of other interesting and easily obtained objects requiring considerable magnifying power. The illustration gives a very good general idea of the instrument, which consists of a neat, flat mahogany box, as a base, into which the Microscope packs when not in use ; an upright brass stem which screws into the lid of the box, and which carries the stage on a sliding tube ; and at its top firmly fixed, the arm which holds the lenses. The focus is adjusted by sliding the stage up or down, so that the eye is not obliged to move its position as is the case with all instruments in which the focussing is effected by moving the lens. The mirror for reflecting the light through transparent objects is mounted on a universal joint, so as to be readily turned in any direction toward the source of light. A brass box with glass bottom and top, for confining insects whilst under examination, and a small pair of brass forceps for placing them within it, are furnished with the Microscope, which is thus a compact and complete instrument adapted equally to the comprehension of the youngest child, and to the wants of the more advanced scholar or botanist; interesting the one in the minute wonders of nature, and leading its infantile mind to examine into the mysteries it unfolds, and aiding the other in his various studies of botany, mineralogy or ento- mology. It is much more readily managed by a novice than a Compound Microscope, and has, with the three lenses combined, almost as much magnifying power as the cheap- est of the latter; whilst unlike it, “ The Child's Microscope” is equally Avell adapted to the examination of large opaque objects, such as beetles, flies or flowers. It can- not be put out of order, excepting by considerable violence sufficient to break it, and any ordinary child can be trusted with its use. Rev. Mr. Wood’s excellent little work, “The Common Objects of the Microscope," No. 1980 of this Catalogue, is an excellent companion to the “ Child’s Microscope,” giving full direction as to its use, and the collection and preparation of objects for THE CHILD’S MICE0SC0PE Prick. 1649. SIMPLE MICROSCOPES. THE SCHOOL MICE0SC0PE. 1650. No. 1650. The School Microscope, . $6 00 This instrument consists of a tubular stem about five inches high, the lower end ot which screws firmly into the lid of the box wherein the instrument is packed when not in use. To the upper end of this stem the stage is firmly fixed ; while the lower end carries a concave mirror. Within the tubular stem is a round pillar having a rack cut into it, against which a pinion works that is turned by a milled head: and the upper part of this pillar carries a horizontal arm which bears the lenses,, so that by turning the milled head, the arm may be raised or lowered, and the requisite focal' adjustment obtained. Three magnifiers are supplied, and by using them either sep- arately or in combination, a considerable range of powers from about five to forty diameters is obtained. A condensing lense for opaque objects, a pair of stage forceps, brass pliers, and an aquatic box for the examination of objects in water, are also sup- plied. This instrument is peculiarly adapted for educational purposes, being fitted in every particular for the examination of botanical specimens, small insects or parts of insects, water-fleas, the larger animalcules, and other such objects as young people may readily collect and examine for themselves: and those who have trained themselves in the application of it to the study of nature are well prepared for the advantageous use of the Compound Microscope. But it also affords to the scientific inquirer all that is essential to the pursuit of such investigations as are best followed out by the concurrent employment of a Simple and a Compound Microscope, the for- mer being most fitted for the preparation, and the latter for the examination of many kinds of objects ; and it may be easily adapted to the purposes of dissection by placing it between arm rests or blocks of wood, or books piled one on another so as to give a support for the hand on either side, at or near the level of the stage. 1650J. The School Microscope, with compound body, eye-piece and objective giving powers from 400 to 10,000 times, . . . . . 11 00 Price.. 32 SIMPLE MICROSCOPES. THE COLLEGE MIGE0S00PE. No. Price. 1651. College Microscope, simple, $25 00 1652. Do. do. with compound body, 30 00 1653. Do. do. do. do. and objectives, . . . 35 00 The College Microscope has been designed for the use of students, likewise as a seaside, travelling, or working microscope. It is both compound and simple, and has a joint for inclining the instrument, and rack adjustment for focusing. It is fitted in a polished mahogany case, six inches cube, and so arranged that on opening the case the instrument stands on the table ready for use, and the appliances, though numerous, exposed to view and readily accessible. The objectives of the compound microscope are achromatic, and useable separate or combined, giving powers of 200, 100, and 50 diameters. The body elongates to give extra power. For use as a simple microscope three simple objectives are sent, useable separately or combined, giving powers with No. 1, 5 ; No. 2, 7 ; No. 3, 11; No. 1, 2, and 13; No. 1 and 3, 16 ; No. 1, 2, and 3, 20 diameters. The case contains a complete set of apparatus and materials required in mounting objects, including turn-table, hot-plate with spirit lamp, dissecting trough, a complete set of materials and implements ordinarily required, with a stock of sides, cover glasses, cells, and labels. The portability and compactness of this apparatus allows of its being conveniently taken into the country or sea-side for use on the spot, thus affording the valuable advantage of not only being able to examine but also readily to mount, whilst in fresh and perfect condition, objects that are liable to become use- less or seriously injured in microscopic value if the mounting has to be deferred until returning home. The Dissecting Trough is placed in the recess of the stage in place of the stage plate, for the purpose of examining or dissecting an object under water, pinned down upon the loaded cork or not, as required. The Turn-table is carried upon a long spindle passed through a hole in the stage, giving a very steady and free motion, and the right hand is steadily supported by the microscope arm close over the turn-table whilst making varnish rings. The top of the turn-table is made only the size of a glass slide and the slide is held in its place by slipping it under an india rubber band, which holds it so firmly as to prevent any risk of shifting. The Ilot-plate is placed in the recess of the stage, the microscope arm being then reversed in position to be clear of the stage, and the stand placed in the opposite position to the one in which it is used as a microscope, the spirit lamp being placed in the position of the mirror. The heated slide, with ring of marine glue upon it, i3 readily and quickly shifted from the hot-plate into the reeess in the bottom board, and centred there at once by pushing it home in the recess, for centering the cell whilst still hot enough to keep the marine glue melted. 1652. SIMPLE MICROSCOPES In Preparing Crystals of salts as polarizing objects, the microscope arm is used as a retort stand for holding the watch glass for evaporating over the spirit lamp : the stage plate being left in its place for warming the slide and coverglass at same time. The microscope arm serves also as a stand for filtering the liquids used in mounting by placing a small folded funnel of blotting paper in the ring of the arm, and setting the bottle to be filled below the stage. The following Materials for Mounting are contained in the set of bottles. The rack containing them can be taken out of the case when in use, or any single bottle is ac- cessible whilst remaining in the case. Asphalte Varnish, for finishing off slides, and making varnish cells. Cold Size, for fixing cover-glasses, &c. Liquid Marine Glue, for making cells and cementing cells on slides. [These are in bottles having a small camel hair brush fixed through the cork, and always immersed in the liquid and ready for use without risk of the fingers getting touched with the varnish. The asphalte and goldsize are kept diluted by occasional addition of benzole, so as to drop freely from the brush.] Turpentine, for cleaning off waste, slides, &c., in similar bottle, with brush fixed in the cork. [These four bottles are fitted tightly into the rack, so that the brush and cork is readily taken out by one hand whilst the other hand is occupied.] Canada Balsam, diluted with benzole sufficiently for dropping freely from the lipped bottle ; the cork is readily removed after being carefully loosened, and the di- luted balsam is used cold, the cover-glass of an object being kept down by a spring clip; the slide being then left in a slightly warm situation, as upon a chimney piece, all the air bubbles become removed in a few hours beyond the edge of the cover-glass, in the course of the evaporation of the benzole, and the superfluous balsam can be scraped off after a few days. Alcohol, in lipped bottle, for cleaning off cells fixed by marine glue, and cleaning objects for mounting, &c. In cleaning off marine glue, after removing it with the scraper to nearly the edge of the cell, working under the microscope with light from below, the cleaning is carefully finished at the edge with alcohol and the scraper. Chloroform, for cleaning cover-glasses and slides, diluting varnish, &c., and for killing and cleaning insects, &c. Liquor Potassse, for softening and bleaching the hard coverings and antennae, &c. of insects. Goadby's Fluid, for mounting animal objects. Glycerin and Carbolic Acid Water, for mounting vegetable objects consisting of glycerin mixed with thirty times the quantity of distilled water in which carbolic acid has been soaked, tbe whole being filtered. Distilled Water, in larger bottle, for washing objects for mounting The contents Df these bottles are filtered with advantage after remaining in use for some time, to remove particles of dust, r>0 1918. Mounted epecimens of minerals, &c., for the Polariscope, consisting of polished plates of carbonate of lime, beryl, arragonite, nitre, Brazilian topaz, Rochelle salt, sulphate of barytes, crystallized sugar, borax, amethyst, bichromate of potass, sulphate of iron, &c., &c., cut at right angles to their axis, for exhibiting the colored rings produced by the action of these crystalline bodies on polarized light, each, 1919. Plates of polished quartz of different thickness, to exhibit the changes due to various thicknesses of the plates, each, . . . . . 4 00 1920. Plates of polished quartz, nitre, Iceland spar, topaz, &c., &c., with two and four axis, each, .......... 4 00 1921. Two glass plates set in a brass rim, with clamping screws, to show Newton’s rings, each, 5 00 1922. Nicol’s Prism of Iceland Spar, J inch long, 2 75 1923. Do. do. | do 3 25 1924. Do. do. f do. . . . . . . 4 00 1925. Do. do. I do 4 50 1926. Do. do. 1 do 5 00 1927. Do. . do. J do. cut perpendicular, . . 4 25 1928. Do. do. $ do. do. . . 5 00 1929. Do. do. f do. do. 5 50 1930. Do. do. I do. do. . . 6 25 1931. Do. do. 1 do. do. 7 00 1932. Do. do. l‘J do. do. . 11 00 Prick. Larger sizes imported to order. OPHTHALMOSCOPES AND LARYNGOSCOPES. 1933. Ophthalmoscopes in hard rubber frames, with condensing lens, . . 3 50 1934. Liebrich’s Ophthalmoscope in hard rubber frame, concave mirror, 1J inches diameter, convex condensing lens and attached diaphragm, with three concave and one convex lens to adjust at pleasure, . . 6 50 1935. Pocket Ophthalmoscope, with two Bi-convex Lenses, If and 2 inch focus, and a series of 5 lenses of various foci, fitting on an arm be- hind the perforated mirror, the whole packed in a morocco case, . 8 50 1936. Improved Adjusting Binocular Ophthalmoscope, . . . . . 35 00 1937. Dr. Galezowskie’s Ophthalmoscope, consists of a brass tube about 10 inches long, with joints to slide together as a telescope; in this tube the concave mirror and condensing lens are permanently placed, with adaptations for their proper adjustment when in use, . . 22 00 1938. Laryngoscope for examining the larynx, consists of a large concave mirror for reflecting the light down the patient’s throat, and a series of concave speculums with long handles for making the required examinations, . 16 00 TRIAL SIGHTS. 1939. Nachett’s Complete Series of Trial Sights, consisting of 32 pairs spherical convex and 32 pairs spherical concave lenses, from 2 to 72 inches focus; 19 pairs cylindrical convex and 19 pairs cylindrical concave lenses, from 6 to 60 inches focus: 9 prisms, angles from 2° to 10°, all mounted in handsome metallic frames; 4 colored glasses, 4 metal disks, 1 stenopaic instrument, and a graduated adjustable frame for holding the various lenses ; the whole packed in a highly- polished mahogany, or morocco covered case, 120 00 OPHTHALMOSCOPES. 57 OPHTHALMOSCOPES AND TEIAL SIGHTS. 1936. 1940. 58 TRIAL SIGHTS. No. 1940. Complete Series of Trial-Sights, consisting of 36 pairs of Convex and 36 pairs of Concave Spherical Lenses, 18 Convex and 18 Concave Cylindrical Glasses, as per Table below, 12 Prisms, angle mentioned in Table below— Pbic*. SPHERICAL CONVEX ( + ). SPHERICAL CONCAVE ( -)• CYLINDRICAL-|- CYLINDRICAL— ANGLE OF PRISMS. 1 4 9 15 26 45 1 4 9 15 26 45 21 51 12 21 51 12 3° 9° 11 4* 10 16 28 50 11 41 10 16 28 50 3 6 14 3 6 14 4° 10° 2 5 11 18 30 60 2 5.11 18 39 60 31 7 17 31 7 17 5° 12° 21 6 12 20 32 70 21 6 12 20 32 70 4 8 21 4 8 21 6° 14° 3 7 13 22 36 80 3 7 13 22 36 80 41 9 25 41 9 25 7° 16° 31 8 14 24 40 100 31 8 14 24 40 100 5 10 30 5 10 30 8° 18° FOCI OF THE VARIOUS LENSES IN INCHES. 2 Blank Disks, 4 Disks with small apertures, 3 Colored Glasses, and a Graduated Adjustable Frame (No. 1946) for holding the various Lenses, the whole packed in a Strong Mahogany Case, . . . $65 00 1941. Series of Trial-Sights, consisting of 24 pairs of Convex and 24 pairs of Concave Spherical Lenses, 9 Convex, and 9 Concave Cylindrical Glasses, as per Table below, 6 Prisms, as per Table below— FOCI OF THE VARIOUS LENSES IN INCHES. SPHERICAL CONVEX ( + )• SPHERICAL CONCAVE (—). CYLINDRICAL + CYLINDRICAL— ANGLE OP PRISMS. 14 7 14 28 40 2 4} 8 16 30 50 3 5 10 20 32 70 3} 6 12 24 36 100 14 7 14 28 40 2 4£ 8 16 30 50 3 5 10 20 32 70 3£ 6 12 24 36 100 3 6 14 4 8 21 5 10 30 3 6 14 4 8 21 5 10 30 3° 6° 4° 14° 5° 18° 2 Blank Disks, 2 Disks with small aperture, 3 Colored Glasses, and a Graduated Adjustable Frame (No. 1946) for holding the various Lenses, the whole packed in a Strong Mahogany Case, . . . $50 00 1942. Series of Trial-Sights, consisting of the complete set of 36 pairs of Con- vex and 36 pairs of Concave Spherical Lenses, as per Table to No. 1940, 2 Blank Disks, 3 Colored Glasses, and a Graduated Adjustable Frame (No. 1946) for holding the various Lenses, the whole packed in a Strong Mahogany Case, . . . . . . . . 50 00 1943. Series of Trial-Sights, consisting of 24 pairs of Convex and 24 pairs of Concave Spherical Lenses, as per Table to No. 1941, 2 Blank Disks, 3 Colored Glasses, and a Graduated Adjustable Frame (No. 1946) for holding the various Lenses, packed in a Strong Mahogany Case, 35 00 1944. Series of Cylindrical Glasses, consisting of 18 Convex and 18 Concave, as per Table to No. 1940, packed in a Strong Mahogany Case, . 17 50 1945. Series of 12 Prisms, from 3° to 18°, as per Table to No. 1940, packed in a Strong Mahogany Case, . 8 50 1946. Graduated Adjustable Spectacle-frame. This Instrument in which the Trial-Sights are held by Springs, is placed on the head like an ordi- nary pair of Spectacles; the distance between the centres of the Eyes is indicated on the Steel bar, and the height of the bridge of the Nose on the Sliding Upright Centrepiece, . . . . . 13 50 1947. Adjusting Cones for Measuring the Distance between the Eyes. Hold- ing the Instrument in the right hand a distant object should be looked at with the right eye through the hole in the right-hand cone; the other cone, fixed to an adjusting arm, should be moved backwards and forwards until the left eye sees the same object through the aperture in the left cone, and the two holes appear as one. The distance between the Eyes is then indicated on the cross bar, one side of which is divided to inches, and tenths, the other to millimeters, 7 50 A CLASSIFIED LIST OF FIRST-CLASS MICROSCOPIC OBJECTS, WITH MANY NEW, RARE, AND INTERESTING SPECIMENS, AFFORDING INSTRUCTIVE ILLUSTRATIONS IN ANATOMY, PHYSIOLOGY, BOTANY, ENTOMOLOGY, GEOLOGY, AND MINERALOGY, INCLUDING THE FINEST PREPARATIONS OF WHEELER, NORMAN, TOPPING MOLLER, BOURGOGNE, VERICK, WALMSLEY, AND OTHER FOREIGN AND AMERICAN ARTISTS. INTRODUCTORY REMARKS AND EXPLANATIONS. Although this Catalogue is intended as a guide in the selection and purchase of objects, yet it is obvious that no such list can be strictly correct for any considerable time, since new objects are being added continually, and the vacancies that occur cannot always be filled instantly. It must therefore be understood that these objects can be supplied on demand with probability rather than certainty; hence, it is advis- able when ordering to name a few more than the number actually required. In this Catalogue about 2,000 objects are comprised ; of these it may be calculated that more than one-half will be found in stock. Any object not specially named will be pro- cured, if possible, when ordered, and orders are solicited for any object desired, even if not named in the Catalogue, as it is our aim to keep and supply the fullest assort- ment of Microscopic Objects to be found in this country. The alphabetical arrange- ment has been preserved throughout, as the easiest guide to any particular specimen. The prices marked on the top of each page have a general signification only to the objects on that page, and refer to the majority that follow. Some of the exceptions are marked; but the prices of many are liable to fluctuation from scarcity or abund- ance, although it is the intention to adhere as closely as possible to the general list of prices herein named. In the selection of these specimens, the aim has not been so much to reduce the price as it has to improve the quality, by supplying every object as clean and perfect as its nature will admit. The predominant wish has not been to introduce as many objects as possible in each department, but rather to rest satisfied with such as are the most beautiful as natural objects, or of their kind the best illustration of special structure or function, and hence, of the highest interest both to the student in science and the popular observer also. 60 LABELS, ETC. Any person confidentially known, or giving reference to those who are, if he desires to purchase a reasonable number of objects, can have an assortment sent for exami- nation and approval, the express charge both ways being at his expense, the objects to be returned within one week, and the risk of damage or loss in transit borne by the purchaser. Such specimens are sent securely packed in rack boxes, affording facili- ties for inspection, as well as for packing and returning those not chosen. In this Catalogue will be found many objects admirably suited to educational and instructional use for the elucidation of general principles, as well as of special appli- cation and adaptation. In Entomology, the various parts of Insects; in Botany, the Elementary Tissues of Plants; in Anatomy and Physiology, the organic structure in Man and the lower animals; the Microscope thereby affords the parent and tutor a pleasing aid to the communication of useful and truthful knowledge. It would be a laborious task to specify those objects that have especial interest either from their novelty, beauty or scarcity ; but there are many that may repay careful notice among the Whole Insects, the Transparent Injections and Polariscope Objects, and the Mis- cellaneous Vegetable Preparations. LABELS. 1948. 1949. 1950. No. Price. 1948. Adhesive Gilt Labels, per hundred, $0 50 1949. Backs, per hundred, .......... 50 1950. Adhesive Labels, with number, per hundred, ..... 25 Adhesive Name Label, round, per hundred, ...... 10 Adhesive Name Label, oval, per hundred, ...... 20 Backs or Fronts, if with holes punched, per hundred, extra, . . 25 MICROSCOPIC OBJECTS. 61 OPAQUE ANATOMICAL INJECTED SPECIMENS. $1. foetal Human Preparations. Intestine, outer and inner surface. Kidney,(also transparent). Stomach, surface and section. Spinal Cord, trans. sec., transparent. Adult Human Preparations. Adipose Tissue. Bladder. Buccal Membrane. Eye, Choroid Membrane, Eye, Ciliary Processes. $2 00. Intestine, small and large, surface. Do. do. section. Stomach, section and surface. Kidney, Tubuli, urinifera. • Do. Veins. Do. Malpighian bodies. Liver, two colors. Lung, opaque and transparent. Muscle, Voluntary and Involuntary. Mesentery. Mucous Membrane. Peyer’s Glands. Placenta. Solitary Gland. Synovial Membrane. Skin, Palm of Hand, surface. Do. Foot, showing perspiration duct3. Do. Back of Hand, with hairs. Tongue, section. Transparent Injections, see p. 62. Morbid Structures. 75 cents. Cancer Cells, Encephaloid and others. Fatty degeneration of Heart. Do. do. Liver Fungoid Liver. Fungus, Achorion Schoenbeni, $1 00 Do. Its effect on the hair, 1 00 The following are Injected. $1 00. Lung, tubercular deposits. Do. Asthma. Do. Emphysema. Do. Pneumonia, 1st stage. Do. do. 2nd stage. Bright’s Kidney. Skin, Papilloma. Eye, Cataract of Crystalline Lens and de- generation of Cortical fibre. $2 50. Frequent Additions to the above. Prom the Lower Animals. Lung of Boa Constrictor. Do. Fowl, Rabbit. Do. Frog, Toad. Do. Cat, two colors Kidney of Toad. Do. Giraffe. Do. Dolphin. Do. Sheep. Do. Lion. Do. Rhinoceros. Intestines of Ostrich. Do. Snake. Do. Monkey. Do. Toad. Do. Cockatoo Do. Horse. Do. Dog, Frog. Muscle of Guinea Pig. Do. Win" of Pigeon. Ova of Toad. Oviduct of Toad. Bladder of Toad. Cloacca of Toad. Palate of Toad. Poison glands of Toad. Palate of Frog. Pad of Cat’s Foot. Do. Lion’s Foot. Do. Panther’s Foot. Stomach of Dog. Do. Toad. Do. Guinea Pig. Do. Lamb. Do. Monkey. Do. Sheep. Do. Tortoise. Skin of Toad. Do. Fowl. Do. Guinea Pig. Do. Ostrich. Tongue of Frog and Toad. Uterus of Guinea Pig. Web of Frog’s Foot. Craw of Fowl. Oviduct of Fowl. Proventriculus of Fowl. Eye, Choroid Membrane from Ox. Eye, Ciliary Processes, from Ox. Eye, Pigment Cells, from Ox. Gills of Eel. Lip of Cat, with hair. Do. Monkey. Do. Rabbit. Lung of Monkey, tubercular. Do. Dog, distemper. Frequent Additions to the above. 62 MICROSCOPIC OBJECTS. ANATOMICAL SPECIMENS. 75 cents and $1. The following are not Injected. 75 cts. Trichnia spiralis, Human, in the Cyst, and separated therefrom. $1 00. Trichina spiralis in Pork. $1 50. Head of Cysticercus from Hare. Fluke from Liver of Sheep. $2 00. Sarcina ventriculi, Human. Echinococci from Cyst, and Ova. Pro-glottis of Toenia solium, with sexual organs. Anguillula from Toad. Toenia from Thrush. Ascaris from Dog and Fowl. Filaria from Rabbit and Fish. Fasciola hepatica. Intestinal Worms from Horse : Trichocephalus crenatus. Spiroptere megastome. Sclerostoma equinum. Entozoa from Cuttle-fish Ova of Toenia from Dog. For Morbid Structures, see p. 61. Urinary Deposits. 75 cts. and $1 00. Twelve to twenty-four Specimens can be supplied, and, in addition to the more usual crystalline forms, some of the specialites in cases of chronic and acute disease. Blood Discs (Typical)— Mammalia, from Man. Carnivora—Cat. Ruminantia—Sheep. Rodentia—Mouse. Insectivora—Hedgehog. Birds—Canary, Passenger Pigeon. Reptilia—Snake, Slow-worm. Amphibia—Frog, Toad, Triton. Cartilaginous Fish—Sturgeon. Osseous Fish—Salmon. Pigment Cells showing the deposit of coloring matter in Skin of African Negro, Sole, Triton, Frog, Toad, Snake. Sepia pigment in Cuttle- fish. Eye of Ox. Tail of Shrimp. Hair of Ornithorhynchus paradoxus. Pigmentum Nigrum of Human Eye. Spermatozoa from Man, Bird, Boar, Ele- phant, Fish, Mouse, Dog, Horse, Rat, Rabbit, Hare. GERMAN ANATOMICAL INJEC- TIONS. Transparent Injections. $1. From the Human Frame. Brain, Cerebrum and Cerebellum. Eyelid, Upper. Kidney, Foetal and Adult. 2. colours. Large and Small Intestines. $1 50. Lung, healthy and diseased. Liver. 2 colours. Skin of Cheek and Chin. Scalp Section with Hair Roots. Skin of Hand (Section.) Tongue showing Papillae. Voluntary Muscle, Arteries injected. From the Lower Animals. Bursa fabricus from Owl. Eye, choroid from Cat. Eye, Ciliary processes from Horse. Eye, Cornea and Iris from Stag. Optic Nerve, Calf, vert. & trans. $1 50 Retina from Calf, Cat, and Rat. $1 50 Cerebrum and Cerebellum of Cat. Ear of Mouse. Medulla Oblongata of Rabbit, Rat. Gills of Eel. Large and Small Intestines of Cat, Rat. Pig, Goat, Mouse, and Ourang Outang, Intestinal Canal of Snake. Ileum of Hare. Stomach of Carp, Mouse. Glandular Stomach of Goose and Stork. (Esophagus of Goose. Oviduct of Hen. $1 50> Kidney of Cat, Marmot, Snake, and Bat. Lung of Goose and Snake. Liver of Marmot and Bat Nose of Mole. $1 50. Nose of Mouse Skin of Horse, vert, and trans. section. Muscle of Pig. Spleen of Guinea Pig. Supra-renal Capsule of Cat. Do. do. Guinea Pig. Tongue of Cat, $1 00. Large, $1 50. Do. Antelope. Do. Goat, Gull, Pig, and Rat. Urinary Bladder of Cat and Goat. Embryo of Pig and Sheep. $2 50. Opaque Injections, see p. 61. MICROSCOPIC OBJECTS. 63 ANIMAL SUBSTANCES AND OEGANS. 75 cents. Human Cartilage from Sternum. Do. do. Foetal. Cellular Cartilage in ear of Bat. Human Tendon (section.) Do. Muscular Fibre, voluntary. Do. do. do. involuntary. Do. do. do. Foetal,- vol. Do. White Fibrous Tissue. Do. Yellow Elastic. Do. Adipose Tissue. Striated Ligamentum nuchae from neck of Giraffe. Muscular Fibre (Voluntary)— Mammal—Man. Bird—Pigeon. Insect—Blowfly. Reptile—Salamander. Fish—Lepidosiren. Ultimate Fibrous Structure in Crystal- line Lens, Eye of Man. Crystalline Lens, Eye of Frog, Shark. Scalp of African Negro, superficial view showing the insertion of hair in tufts. Also vertical section with the curling of hair at the roots. Section of Leather, Calf. Do. Tanned Skin of Hippotamus. Feathers, Transparent— From Emeu, Goldfinch. Do. Humming Bird, Nightingale. Do. Rifle Bird, Australia. Barbs of Fibrils of Feathers Typical of Structure— From Wing of Condor, Owl. Do. Emeu, Ostrich. Down from the Eider Duck, showing tran- sition from Down to Feather. Scales of Pish. Cycloid, Carp and Eel. Ctenoid, Perch and Sole. Ganoid, Lepidosteus, and Section. do. Sturgeon (section). Placoid, Dog Fish, Shark. Epidermis of Saw of Sawfish. Spines of EcMnodermata, Acrocladia trigonaria. Cidaris metulariae. Diadema Savignyi. Echinus esculentes, and lividse. Echinothrix Petersii. Echinocidaris purpurescens. Echinometra lucunter. Hairs (Superficial View)— From African Squirrel. Do. Albino Mole. Do. English Mole. Do. Beaver (felting surface), Do. Bat, Australian. Do. Bat, Indian. Do. Bat, British. Do. Caterpillar of Tiger Moth. Do. do. Yapor Moth. Do. Bird-catching Spider. Do. Mouse, Brown. Do. Mouse, Shrew. Do. Mouse, White. Do. Mole. Do. Ornithorhynchus paradoxus. Do. Ringtailed Monkey. Do. Spider ditto. Do. Rein Deer (body) cellular. Do. do. (legs) bristly. Do. Russian Sable. Do. Rat. Do. Wild Rabbit. Do. Squirrel. Do. Sea Mouse. Do. Seal, Falkland Islands. Do. Sea Otter, ditto. Human Hair, Transverse Sections. Human Hair Surface, various kinds. Do. do. beard shavings. Do. do. bulbous roots. Do. do. eyebrows. Do. do. Albino Girl. Foetal Hair Imbricated surface. Hairs (Transverse Section)— From Ant Eater. Do. Peccary. Do. Eyelash of Whale. Do. Tail of Asiatic Elephant. Do. Tail of African Elephant. Do. Tail of Giraffe. Do. Tail of Hippotamus. Do. Tail of Rhinoceros. Do. Tail of Siberian Mammoth. Do. Whisker of Wild Cat. Do. Whisker of Lioness. Do. Whisker of Walrus. Palate of Garden Snail, Helix aspersa. Do. Cellar Slug. Sepia. Do. Doris bilamelata and tubcrculata. Do. Chiton. Young Crab, 1st Stage. Cyclops quadracornis (Etomostraca.) 1lair and Skin for Polariscope, Page ?3. MICROSCOPIC OBJECTS. ANIMAL SUBSTANCES, BONE, TEETH, SHELL, SPICULES, &c. 75 cents and $1. Sections of Bone. $1 Bone of Albatross. Do. Armadillo. Do. Boa Constrictor. Do. Chimpanzee. Do. Crocodile.* Do. Elephant. Do. Eagle. Do. Flying Fish. Do. Gorilla. Do. Grampus. Do. Lion.* Do. Rhinoceros. Do. Saw Fish. Do. Siluras. Do. Toad. Do. Toad (Surinam). Do. Turtle (fin). Do. Walrus. Do. Whale, kc. Sections of Human Bcnes. $1. Clavicle (transverse). Femur (transverse).* Do. (vertical).* Skull, parietal and frontal.* Earthy Matter of Femur. Animal do. do. Foetal Bone, Femur (transverse). Do. do. (vertical). A series of (12) slides, completely illus- trating the Structure and Growth of Bone, Cartilage, $10 00. Sections of Teeth. $1. From Alligator, Cat Fish. Do. Deer, Dolphin. Do. Dugong, Hippopotamus. Do. Fox, Hare, Horse. Do. Human (various).* Do. Myliobatis, Zygobatis. Do. Porcupine, Rhinoceros.* Do. Rabbit, Rat, Ox.* Do. Saw Fish, Silurus. Do. Sheep, Shark. Do. Sperm Whale,* Suis Gigas. Do. Tiger, Wild Cat, Walrus. Ossification of Pulp cavity in Tooth of Elephant. Sections of Shell. Egg of Emeu, Cassowary. Do Ostrich (superficial and vertical) Do. Guinea Fowl, Goose. Pearl Oyster (avicula margariticea). Haliotis splendens. Pinna marina (vert. sec. and surface). Crab (vertical and superficial section). Cyprea annulus, Cerithium atratum. Meleagrina margaritifera. Oliva Peruviana. Ricinula ricinus (long, sec.) $1 25. Mitra cucumerina (long, sea.) 1 25. Cerithium atratum (long, sec.) 1 25. Terebratula Australis. Orbiculina complanata Syderolina Spenglerii. Foraminifers, in chalk formation (section) Hydrophora rigida do. do. Seriatopora hystrix do. do. Section of White Coral. Red do. Do. Pearls from River Tay. Spicula from Zoophytes, &c. 75 cents. Alcyonium digitatum. Spongilla Mcyeni, Ceylon. Do. plumosa, Bombay. Glass Rope Sponge (Hyalonema mirabile). Geodia Baretti. Grantia compressa. Hymedesmia Johnsoni. Halichrondria Grifiithsii. Pachymatisma Listeri. Tetliia cranium. Tethia lyncurium. Gemmules of Sponge Geodia. Section of Smyrna Sponge. British Spongilla and Spongilla Meyeni, with Spicula in situ. Fibres from Euplectella speciosa. Spines of Spatangus. Spicula of Gorgonias, various. Ambulacral disks from Echinus. Plates and hooks (Astrophyton Linkii). Do. do. (Synapta digitata). Do. do. Synapta (inhaerens). Wheel Plates, Chirodota (violacea). Do. do. do. (inhaerens). Cutaneous plates (Holothuria edulis). Do. do. Ilolothuria (floridana). Do. do. (from Tongataboo). Spicules of Xenia. Do. Renilla Americanus. Spines of Brissiopis. Do. young Star Fish. Star Fish. Seven Pointed Spicules of Sponge. *These may be nad larger size. MICROSCOPIC OBJECTS. 65 TEST OBJECTS AND DIAT0MA0EU. 50 and 75 cents. Thickness of covering glass . -006 For l-12th and l-16th Objectives *004 For l-20th, l-25th, and l-50th Object- ives ‘003 The following are Mounted Dry. Genus Pleurosigma. Balticum, Hippocampus, quadratum, strigosum, strigilis, attenuatum, in- termedium, elongatum, Spencerii, angulatum, fasciola, scalprum, mac- rum. Navicula—Cuspidata, crassinervis. Amician test, N. rhomboides. Nitzschia birostrata. Nitzschia sigmoidea. Surirella gemma. Hyalodiscus subtilis. Grammatophora marina. Do. subtilissima. Do. serpentina. Amphipleura pelucida. A Series of Test Diatomacese arranged on one Slide. Price $6 00. Test Diatoms in Balsam. Pleurosigma formosum. Do. decorum, Hippocampus. Do. Balticum, strigosum. Do. attenuatum, strigilis. Miscellaneous Test Objects. Scales of Lepisma saccharina. Do. Podura plumbea. Do. Amathusia Horsfieldi. Do. Tinea vestimenti. Do. Morpho menelaus. Do. Hipparchia janira. Do. Pontia brassicse. Do. Pieris rapse. Do. Wing of Gnat. Do. do. do. in Balsam. Hair of Indian Bat. Do. Australian Bat. Do. Indian Mouse. Do. Dermestes (Anthrenus). Proboscis of Blowfly. Pvgidium of Flea. Ultimate Fibrous Tissue of Muscle of Pig (Powell’s Test). $1 00. Disks of Deal (Dr. Carpenter’s Test for Achromatism). Ocean Telegraph Soundings, From Indian Ocean, 2,200 Fathoms. Do. Red Sea, Selections. Do. Persian Gulf, 504 Fathoms. Do. Coast of Malabar, 188 Fathoms. By Prof. Sir Wm. Thompson, F.R.S. 1856. Atlantic Ocean, 2,010 fathoms. 1866. Do. do. 2 miles deep. Diatomacese, &c,, from Guano. California. Isle of Elide. Old Ichaboe, 1844. New, 1860. Lobos de Tierra. Canary Islands. Saldannah Bay. Chincha Islands St. Helena. Lower Peruvian. Bolivia. New Peruvian, 1862. Guanapee Island. Mejillowes. Recent Diatomacese from Ormesby, Torquay, Keswick. Ocean Surface (Bay of Bengal). Brodick Bay (Isle of Arran). Coast of Cherbourg, Japan, Cuxhaven, Kiel, Corsica, St. Bees. Rivers Humber, Thames, Severn. Possil Infusorial Deposits from Australia, Bermuda. Badjik (Turkey), Santa Fiore. Berghmehl, Lapland, and Sweden. Cornwallis, Nova Scotia. Los Angelos, California. Cherryfield and Monmouth, Maine. Perley’s Meadow, South Bridgton, Maine Duck Pond and French’s Pond, Maine. Calvert County, Richmond, U. S. Shokoe Hill, Bangor, U.S. Polirschiefer Bilin, Bohemia. Liineburg, Franzenbad, Eger, Bohemia. Linfjord, Jutland. Oran, Algeria. Maremma, Leghorn. Lamplugh, South Australia. Stonyford, River Down, Ireland. Med Combre, Antrim, Ireland. Lough Mourne, Toome Bridge, Ireland. Holderness, Yorkshire. Isle of Raasay, Scotland. Isle of Mull, Scotland. Dolgelly, North Wales. 66 MICROSCOPIC OBJECTS. KECENT AND P0SSIL DIATOMACEiE. 75 Cents. Many of these are in symmetrical groups, $1.00, and some in larger and more elaborate forms at $1.50 to $2.50. Acnanthes brevipes. A. longipes. Actinocyclus subtills. Actinoptycbus Barkley!. A. duodenarius. Do. Halionyx. A. hexagonale. Do. radiatus. A. Ralfsii. A. splendens. Do. trilingulatus. A. undulatus. Amphitetras antedeluviana. A. nobilis. Do. ornatus. A. producta. Do. trilingulatus. Amphlprora pulchra. Amphora ovalis. Arachnoidiscus Ehrenbergii. A. elegans. Do. Indicus. A. Japonicus. Do. ornatus. Asterolampra afllnis. A. ambigua. Do. Brightwelliana. A. Marylandica. Do. concinna. A. marginata. Do. decora. A. Ralfsiana. Do. Rylandsiana. A. spatangidium. Do. Stella. A. vulgaris. Asteromphalus arachne. A. Brookei. Do. Moronensis. A. Ralfsianus. Do. Roperianus. Aulacodiscus angulatus. A. Comberi. Do. crux. A. formosus. Do. Kittonii. A. Margaritaceus. Do. oreganus. A. Petersi. Do. radiatus. A. scaber. Auiiscus elaboratus. A. coelatus. Do. obscurus. A. ovalis. A. punctatus. Do. sculptus. A. Peruvianus. Biddulphia aurita. B. pulchella. Do. lsevis. B. obtusa. Do. regina. B. reticulata. Do, robusta. B. (New), not named. Brightwellla Johnsonii, Campylodiscus clypeus. C. costatus. Do. Kittonianus. C. limbatus. Do. spiralis. Cerataulus turgida. Chsetoceros didymum. Colletonema neglecta. Cocconeis Gregoriana. C. regalis. C. splendida. Cocconema cistula. C. lanceolatum. C. parvum. Coscinodiscus centralis. C. concavus. C. elegans. Do. ellipticus. C. gigas. C. New species. Do. oblongus. C. oculus iridus. Do. ovalis. C. radiatus. Do. symmetricus. C. linesetus. Craspedodiscus coscinodiscus. C. elegans. Creswellia ferox. C. superba. C. turris. Cyclotella astrea. C. rotula. Cymbella Ehrenbergi. C. gasteroides. Cymatopleura elliptica. C. solea. Diatoma grande. D. vulgare. Dicladia capreolus. Donkinia carinata and minuta. Doriphora Boekii. Epitbemia gibba. E. granulata. E. turgida. Endyctia oceanica. Encyonema parodoxum. Eupodlscus Argus. E. Jonestanus Do. Hardmanianus. E. radiatus. Do. Rogersii. Euphyllodium spathulatum. Fragillaria capucina. F. virescens. Gephyria incurvata. Glyphodiscus stellatus. Gomphonema geminatum. G. olivatia. Heliopelta Euleri. H. Leuwenhoeki. Do. metti. H. Selegeri. Hemidiscus cuneiformis. Himantidium pectinale. Homeocladia Martininiana. Hemiaulus alatus. H. polyclstinus. Hydrosera trlquetra. Istbmia enervis. I. nervosa. Do. (New), not named. Licmophora splendida, Merldion circulare. Mastogloia Grevillii. Melosira radians. M. varlans. Navlcula Amphlsboena. N. clepsydra. Do. convexa. N.dldyma, N. elliptlca. Do. Entomon. N. flrma. N. formosa. Do. granulata. N. Jennerii. Do. Kennedyii. N. lyra. Do. Northumbrica. N. maxima. Do. pretexta. N. quadrata. N. serians. Do. spectabilis. N. splendida. Do. Smithil. N. vlrgata. Nitzscbla Insignis. N. obliqua. Do. pandurlformis. N. scalaris. Do. sigmoldea. N. sigma. N. vlvax. Odontidlum Harrisonl. O. mesodon. Omphalopelta cellulosa. O. versicolor. Orthosira arenaria. Pinnularia alpina, P. Jolinsonii. P. lata. Do. major. P. nobilis. P. oblonga. Do. vlridis, Polymyxis coronatls. Porodiscus elegans. Pyxidicula cruciata. Rhabdonema Adriatica. R. arcuatum. Rylandsia biradiata. Scbizonema Grevillii. Seriatophora hystix. Solium exculptum. Stauroneis acuta. 8. Phcenicenteron. Do. pulchella. Stepbanogonia Danica. Stictodiscus Californicus. Surirella biseriata. S. constrlcta. S. fastuosa. Do. minuta. S. nobilis. S. ovalis. Do. Slesvicensis. S. splendida. Symbolophora trinitatis. Syndendrium diadema. Synedra capitata. 8. crystalina. 8. radians. Do. robusta. 8. splendens. Do. superba. 8. undulata. Tabellaria fenestrata. Terpsinoe musica. Toxinidea Gregoriana. Triceratium arcticum. T. armatum. Do. brachiatum. T. coniferum. Do. cinnamoneum. T. favus. Do. flmbriatum. T. grande. Do. megastomum. T. Marylandica. Do. Monteryi. T. orbiculatum. Do. parallelum. T. serratum. Do. spicatum. T. striolatum. Do. subcnpitatum. T. variabile. Do. Zonatulatum. T. New species. Trinacria excavata. T. regina. Amphiprora pulchra. Amphora ovalis. 67 MICROSCOPIC OBJECTS E0SSIL, WOOD, BONE, COAL. $0 75 and $1 00. Fossil Substances. Sections of Teeth of Shark, &c. (vertical and transverse). Bones and Teeth of Fish in situ from Northumberland Coal Shale. Coprolites, from Lyme Regis. Section of Coal. Transverse, Vertical, and Radial. Derbyshire, Newcastle, Yorkshire, Scot- land, China, Australia, America, Hera- clea on the Black Sea, Tertiary Coal, Bovey Tracey. Cannel or Parrot Coal. Torbane Hill Coal, from which Young’s Paraffin Oil is made. Sections of Jet (Whitby). The above, very large size, $2.50. Fossil Bone of Man (Guadaloupe). Do. Mastadon. Irish Elk. Do. Crocodile.—Dugong. Do. Ichthyosaurus.— Iguanodon. Do. Pterdactyl.—Whale. Do. Dinornis giganteus, New Zealand. Sections of Fossil Wood. Endogens from Antigua, &c. Palm, vertical and transverse.. Palm, from West Indies and Ceylon. Fern, stem, and root. Conifers and Exogens from Derbyshire, Portland, Lough Neagh. Unknown forms from Lancashire Coal. Fibrous Fossil Wood, Egypt. Opalized Wood, Tasmania. Fossil Sponge. Fossil Coral, Acervularia pentagona. Pentacrinus basaltiformis. Shells. Foraminifera, Adriatic Sea. Do. Bay of Bengal. Do. The Levant. Do. The River Nene. Polycystina, Barbadoes, various. Do. Island of Nicobar. Do. do. Bermuda. GEOLOGICAL SPECIMENS. $0 75 and $1 00. JSee also those at pages 72 and 74. Moss Agates, various. Basalt—Giant’s Causeway. Do. Fingal’s Cave. Do. Staffordshire. Carbonate of Lime. Stalactite. Flint, with various organic remains, Spi- cules, Sponges, Corals, Xanthidia (or Sporangia), and Shells. Granite from Aberdeen. Do. Peterhead. Do. Killiney, Ireland. Do. Guernsey. Do. “ Greenland’s Icy Mountains.” Do. Cornwall, Cheesewring. Do. Greywacke from Labrador. Syenite from Mount Sorrel. Do. Sarcophagus in Gt. Pyramid. Limestone, Nummulitic—foundation of the Great Egyptian Pyramid. Limestone, St. VincenPs Rock. Limestone, Magnesian, Dudley. Do. Mountain, Scotland. Do. Upper Silurian, Dudley. Do. Oolitic, Clifton and Bath. Do. Encrinital Marble. Do. Foundation Stone of Old Blackfriars Bridge. Do. Himalaya Mountains. Do. Lyme Regis and Portland. Do. Niagara Falls. Many of the above contain interesting or- ganisms—Foraminifera, Echini, Shells, Coral, Spicules, Nummulites, &o., &c. Lapis lazuli. Lepidolite. Madrepores, various, Torquay. Black Marble. Encrinital Marble, Derbyshire. Marble, Carrara, Temple of Ephesus. Green Malachite from Russia. Blue Malachite from Australia. New Red Sandstone, Cumberland. Old Red Sandstone, Scotland. Pitch Stone, Isle of Arran. Red Porphyry, Egypt. Brown Porphyry, Sweden. Heliotrope, Blood Stone. Sun Stone. Serpentine, Red and Green. Water Cells in Quartz Rocks from Nor- way and Mount Blanc. Various Organisms from the Chalk, Chalk Marl and Gault, 68 MICROSCOPIC OBJECTS. MICRO-PHOTOGRAPHS. 75 cents and $1. 200 Kings and Queens of England. Her Majesty Queen Victoria. The late Prince Consort. The Royal Family, 1861. The Prince and Princess of Wales. Napoleon III. and Eugenie. Shakespeare. General Garibaldi. Right Hon. W. E. Gladstone. John Bright, Esq., M.P. Charles Dickens. Sir John Herschell. The Lord’s Prayer Illuminated. The Creed Illuminated. The Ten Commandments Illuminated. The whole of the Sermon on the Mount Matt. ch. v., vi., vii. The Crucifixion, Michael Angelo. The Descent, Jose Bellver, Madrid. Christ Blessing Little Children. Rebecca and Laban. The Fall of Nineveh, Martin. Belshazzar’s Feast, Martin. Passage of the Red Sea, Martin. The Great Day of His Wrath, Martin. The Great Pyramid and Sphinx. Hindoo Mosque, a. d. 1469. Statue of Buddha, Japan. Notre Dame Cathedral, Paris. Milan Cathedral. View of Rome. The Falls of Niagara. Fingal’s Cave (StaflFa). The Giant’s Causeway. Tintern Abbey. Fountain’s Abbey. Melrose Abbey. York Minster. Canterbury Cathedral, interior. Windsor Castle. Osborne House. Balmoral. Sir Walter Scott’s Monument. St. Paul’s Cathedral. The Houses of Parliament. The Crystal Palace and Fountains. Trafalgar Square, Moonlight at Sea. Great Eastern Steamship. American River Steamship. £1,000 Bank of England Note. The Times Newspaper, 12,500 words. Title Page of Punch. Map of Europe. The Marriage of Her Majesty. Mrs. Fry reading the Scriptures to the Prisoners in Newgate Uncle Tom and Eva. The Play Scene in Hamlet. The Death of Lord Nelson. The Dame School. Happy as a King. The Afternoon Nap. The Village School in Uproar The Blind Fiddler. Laying Down the Law. Bolton Abbey in Olden Time. The Derby Day, W. P. Frith, R. A. The Railway Station, do. Life at the Sea Side, do. The South Sea Bubble. The Horse Fair, Mdlle. Rosa Bonheur. The Moon, Crescent and Full. The Planet Saturn, Rings, &c. The Planet Jupiter, Belts, Moons, &c. Statue—Sabrina. Ariadne. Franklin’s Letter to Strahan. Declaration of Independence. Ticket to Heaven. Eminent Women—105 portraits Eminent Men—115 portraits. Going with the Stream. Going against the Stream. The Origin of Music. “Oh!” “ May and December.” “ Did you Ring?” “ Sherry, Sir?” PARASITIC INSECTS, ACARI, &c. 75 cents and $1, Parasites from Vampyre, Bat, Canary, Curlew, Crow, Dog, Fowl, Eagle, Gull, Hedgehog, House Fly, Bee, Horse, Mole, Ox, Passenger Pigeon, Rook, Starling, Fern, Turkey, Water Rat, Sole, &c. Flea from Bat, Cat, Dog, Eowl, Pigeon, Mole, Squirrel, Hedgehog. Acarus from Cheese and Meal. Acarus from Sugar and Ergot of Rye. Human Associates— Flea (sexes), Pulex irritans.. Bed Bug, Cimex Iectularius. Acarus of Itch. Sarcoptes scabiei. $1 50. The same, with Male, Female and Larva, on one slide, $2.50. Face Insect, Desmodex folliculorum. Crab Louse, Pediculus pubis. $1 25.' Body Louse, P. vestimenti. 1 25. Head Louse (se»es), P. capitis. Harvest Bug, Trombidium. 1 25. The sexes of the above may be had. MICROSCOPIC OBJECTS 69 WHOLE INSECTS. 75 cents to $3. Plies and their Allies Aphis rosae, and others. Ant, Formica rufa, and others. Blossom Fly, Anthomyia pluvialis. Bronze Fly, Pachygaster ater. Biting Field Fly, Stomoxys calcitrans. Black-tip Fly, Ortalis vibrans. Cattle Fly, Musca corvina. Corn Fly, Empis livida. Crane Fly, Tipula oleracea. $1 50. Dung Fly, Scatophaga merdana. Drone Fly, Helophilus pendulus. Flirt Fly, Sepsis punctum. Fantail Fly, Dolichopus A2neus. Fungus, Mycetophila. Gnat, Culex pipiens, Sexes (Male). Do. Window, Rhyphus fenestralis. Do. Ringed, Culex annulatus. Do. Plumed, Chironomus plumosa. Do. Winter, Trichocera hiemalis. Do. Wood, Sciara brunipes. Do. Short Legs, Micropeza corrigiolata. Grass Fly, Opomyza germinationis. Hairy Fly, Bibio Marci. Hawk Fly, Dioctria rufipes. Herbage Fly, Platypalpus fasciatus. His Grace, Calobata petronella. House Fly, Musca domestica. Ichneumon Fly, Ophion luteum. $1 50. Lace Wing, Chrysopa perla. $2 00. Leaf Insect, Phyllophorella acerina. Mayflower Fly, Dilophus. Merrydancer, Hilara maura. Mosquito, Culex Mosquito Australis. Mosquito, Jamaica, Labrador, &c. Midge, Psychoda. Mud Fly, Borborus longipennis. Marsh Fly, Tetanocera aratoria. Marsh Crane Fly, Phycoptera. Nettle Fly, Platystoma seminationis. Pearl Fly, Siali3 lutarius. Scorpion Fly, Panorpa communis. $1 50. Shadow Watcher, Syritta pipiens. Snipe Fly, Leptis scolopacea. Snout Fly, Rhingia campestris. Saw Fly, Allantus scolopacea. $1 25. Thistle Beetle, Crepidodera ferruginea. Thrips, Phlaeothrips coriaceus. Vinegar Fly, Drosophila cellaris. Unicorn FlyrOdontocera denticornis. Wasp Fly, Syrphus ribesii. Window Fly, Phora. Our assortment of the above, as of all other Whole Insects, is constantly changing with frequent additions. Bugs, Beetles, &&, Corn Bug, Miris. Cuckoo Spit, Aphrophora spumaria. Collared Florist. Anthobium torquatum. Cardinal Beetle, Pyrochroa rubens. Earwig, Forficula auricularia. Frog Hopper, Amblycephalus viridis. Grass Hopper, Locusta viridis. Glow-worm, Lampyrus noctiluca. Grass Flea, Thyamis femoralis. Lady Bird, Coccinella variabilis, &c. Parsnip Beetle, Anaspis melanopa. Pond Beetle, Lactophilus minutus. Mud Beetle, Hyphydrus ovatus. Marsh Flea, Delphax lineata. Raspberry Beetle. Soldier Beetle, Telephorus. Sailor Beetle, Halipus lineatocollis. Thistle Beetle, Crepidodera ferruginea. Wood Beetle, Leptura levis. Water Beetle, Hygrotus elegans. Water Bug, Corixa fossarum. Water Boatman, Notonecta glauca. Water Scorpion, Nepa cinerea. Pond Skater, Gerris lacustris. Ditch Skater, Velia rivelorum. Gyrinus natator. Spiders, Bush Spider. Garden Spider, Epeira diadema. $3 00. Ground Spider, Lycosa agrestica. House Spider, Aranea labyrinthica. Harvest Spider, Phalangium cornutum. Hunting Spider, Drassus lucifergus. Shepherd Spider, Opilio. Water Spider, Argyroneta aquatica. Water Wolf, Lycosa aquatica. Larvae and Pupae. Pupa of Water Boatman. Do. Scorpion. Larva of Dragon Fly, Agrion. Do. of Water Beetle. Do. and Pupa of Gnat. $1 25. Do. Flea, House and Blow Fly. Do. Bot Fly in Egg, on hair. Do. Staphylinus, Devil’s Coach-horse. Do. Lady Bird, Coccinella. Wire Worm. Centipede, Lithobius forcipatus. Millipede, Geophilus electricus. Skin of Caterpillar, many species. Do. Silkworm, Bombyx mori. Earth Mite, Trombidium. 70 MICROSCOPIC OBJECTS. PARTS OP INSECTS. 50 and 75 cents. Antenna of Cockchafer, sexes. Do. House Fly, and Blow Fly. Do. Moths, Gnat, sexes. Head of Butterflies and Moths. Do. Crane Fly, Gnat. Do. Mosquito (Lancets). Eye, showing facets, transparent. Eye, Cockchafer. Eye, Crane Fly. Eye, Dragon Fly. Eye, House Fly. Eye, Humble Bee. Eye, Butterfly. Eye of Beetle, prepared to show multiplied images reflected from facets of Cornea. See also Opaque, Page 11. Gizzard of Dytiscus. Do. Cricket. Stomach of Beetle. Do. Blow Fly. Foot of Caterpillar. Leg and Foot of Blow Fly. Do. Drone Fly. Do. Dung Fly. Do. Dytiscus. Do. Frog Hopper. Do. Gyrinus. Do. Honey Bee. Do. Hawk Fly. Do. Hornet. Do. Ophion. Do. Pearl Fly. Do. Saw Fly. Do. Spiders, various. Do. Wasp. Mouth and Jaws of Wasp. Do. Spiders. Feathered Oar of Corixa. Do! do. Dytiscus. Expanding Paddle, Gyrinus. Lancets of Flea. Do. Bed Bug. Do. Gad Fly. Do. Mosquito. Do. Gnat. Ovipositor of Cuckoo Spit. Do. Crane Fly. Do. Blow Fly. Do. Drone Fly. Do. Dragon Fly. Do. Saw Fly. Do. Frog Hopper. Do. Corn Bug. Proboscis or Tongue— Do. Butterfly and Moth. Do. Honey Bee, Humble Bee. Do. Blow Fly, House Fly. Do. Cricket, Hawk Fly. Do. Drone Fly, Rhingia. Reproductive Organs, Male Wasp. Do. Do. Hornet. Scales from Wings of— Death’s Head Moth. Oak Egger. Cloth Moth. Pa*is Butterfly. Fritillary. Giant Silk Moth, Japan, and many others. See also Test Scales, page 65. Spinneret of Silkworm. Do. Garden Spider. Skin of Caterpillar. Do. Chrysalis. Do. Silkworm. Do. Garden Spider. Spiracles of Blow Fly. Do. Drone Fly. Do. Cockchafer. Do. Dytiscus. Do. Privet Caterpillar. Sting of Bee. Hornet. Wasp. Do. With poison gland. $1 50. Tail of Dolichopus iEneus. Tracheae of Silkworm. Do. Blow Fly. Do. And ultimate ramifications in stomach of Bee. $100. Do. In nerves of Caterpillar. 1 00. Do. Intestines of Blow Fly. Halteres of Crane Fly. Rhingia. Do. Drone Fly. Blow Fly. Wings of Bee, with booklets. Do. Hornet, do. Do. Wasp, do. Do. Blow Fly. Do. Butterflies, various Do. Moths, do. Do. Mosquitos. Elytron of Corixa fossarum. Do. Water Beetles, various. Winglet of Blow Fly. Anatomy of the Blow Fly, 12 Slides in a box, $1.50. For Insect Anatomy, complete on one Slide, see page 77 MICROSCOPIC OBJECTS. 71 OPAQUE AUD BINOCULAE OBJECTS. 75 cts. and $1. Diatomacese on Sea Weed, in situ. Gemmules of Sponge. Hairs of Peccary, sections. Isthmia nervosa and enervis. Orthosira arenaria. Shell of Orbitolite. Spine3 and Shell of Spantangus. Spicules of Gorgonias. Young Oysters. Ophiura texturata. $1 50. Ophiocoma rosula. $1 50. Feathers of Humming Birds. Do. Love Bird. Peacock. Do. Rifle Bird, Australia. Skin of Sole— From Belly and Back. Do. Dogfish. White Shark. Brittle Starfish, Ophiocoma neglecta. Sun Starfish, Solaster papposa. $2 00. Bones of Ophiocoma rosula. Pedicellaria of Echinus spliaera. Do. Echinus esculentus. Do. Uraster rubens. Spines of Palmipes membranaceus. Sponge with Spicules, in situ. Spider Crab, Stenorhynchus phalangium. Mantis Shrimp. Polyzoa, Corallines, &c. Anguinaria spatulata. Bicellaria ciliata. B. grandis. Bugula avicularia. Catenicella plagiostoma. Cellularia avicularis. Crisea eburnea. Flustra foliacea. Membranipora pilosa. Notamia bursaria. Sertularia operculata. Whole Insects, &c. Tingis arcuata. Beetles and Weevils, various. Cicada from Maryland, Gall Fly, Typhloryba uloni. Asparagus Beetle. House Fly. British Diamond Beetle. Eggs of Insects, various. Do. Parasite of Pigeon. Do. do. Hornbill. Do. and Larvae of Oak Egger. Eyes showing facets, from Beetle, House Fly, Butterfly, Moth. Facets and Ocelli in Wasp. Do. do. Dragon Fly. Eyes of Garden Spider. Aphis pierced by Ichneumon Fly. Legs of Dytiscus marginalis. Heads and Parts of Beetles. Cyphus germari. Cicindela sylvatica. Eustales adamantinis. Chrysolophus. Curculio imperialis. Eupholus. Hypomeces squamosus. Golden girdle. Exuvium of Myriapoda, Polyxenus. Wing of Magpie Moth. Do. Butterfly. Azure Blue. Do. Cloth Moth. Yapourer. Do. Alexis. Clouded Yellow. Do. Fritillary. Morphomenelaus. Do. Paris. Peacock. Copper. Do. Tortoiseshell. Red Admiral. Palate of Haliotis tuberculata. Do. Limpet, Patella vulgaris. Do. Periwinkle, Littorina littoralis. Do. Trochu3 zizyphinus. Do. Whelk, Buccinum undatum. Do. Gizzard of Cricket. Foraminifera—from Adriatic Sea, Bay of Bengal, Levant, River Nene. Polycystina, Barbadoes, various Fossil Infusoria. Transparent at page 67. Opaque Objects, Mounted expressly for Binocular and Lieber- kuhn Symmetrical Groups, $1 to $15. Arachnoidiscus Ehrenbergii. Actinosphcenia splendens. Aulacodiscus radiatus. Actinoptychus undulatus. Biddulphia pulchella. Campylodiscus costatus. Coscinodiscus radiatus. Foraminifera, various. Heliopelta metii. Isthmia nervosa and enervis. Pinnularia major. Pleurosigma formosum. P. Balticum. P. Hippocampus. P. Decorum. P. Angulatum. Triceratium favus. Polycystina, various. Haliomma Humboldtii. Astromma Aristotelis. These may be had Transparent. 72 MICROSCOPIC OBJECTS. OPAQTJE AND BINOCULAK OBJECTS. 50 and 75 cents. Opaque Minerals, &c. Avanturine (artificial.) Antimony, Needle form. Do. Red, Oxy-sulphuret. Crystals of Berberine. Bismuth. Sulphuret of Iron. Crystalline Oxide of Lead. Do. Lead, Ore, Galena. Do. Titanium, Indigo. Do. Lava from Mt. Vesuvius. Do. Silver, Electro deposit. Decomposed Glass from Pompeii. Peacock and Ruby Copper. Fibrous or Moss Copper. Specula Iron from Elba. Gold Nuggets, California. Gold Dust, British Columbia. Gold Sand with Quartz, Australia. Gold Leaf transmitting Green Light. IIypersth6ne. Sun Stone. Iridescent Oxide of Lead. Iridium. Ores of various Metals. Picrotoxine. Tooth of Myliobatis and Zygobatis. Gill of Sword Fish. Ivory Turnings. Vegetable, Leap of Deutzia. Nettle, with Stings. Do. Elseagnus, Onosma taurica. Do. Alyssum Olympicum. Skeleton Leaf of Box Tree. Section of Leaf of Orchid. Do. Stem of Clematis. Do. do. Sugar Cane. Do. Shell of Mexican Gourd. Do. Pith of Rice Paper Plant. Seeds of Antirrhinum. Dandelion. Gar- den Poppy. Henbane. Lobel’s. Catch- fly. Orchis. Portulaca. Petunia. Paulowmia imperialis. Eccremocarpus Scaber. Pollen of Hollyhock. Mallow. Rapliides from Tabaiba. Peristomes of Mosses, various. Funaria hygrometrica, mounted in cell for hygrometric experiment. Fungus (Blight) On Leaf of Pea, Erysiphe Martii. On Gooseberry, .Alcidium grossulariae. On Bramble, Aregma bulbosum. On Willow, Puccinia pulverulenta. On Alchemilla, Uredo potentillarum. On Thistle, Trichobasis suaveolens. On Hop Mildew, Sphaerotheca castagnei. AEGE, DESMIBIACE2E, FUNGI, &c. 75 cents. Confervaceae, Algae, and Desmidiaceae. Batrachospermum moniliforme. Draparnaldea plumosum. Zygnema, Closterium, Euastrum. Micrasterias rotata. Volvox globator. Spirogyra. Hepatica, Frullania dilatata. Marine Algae. Calithamniom, corymbosum. Do. refractum. Ceramium citatum. Cladophora rupestris. Catenicella plagiostoma. Dasya coccinea. Griffithsia. Polysiphonia parasitica. Do. fibrata. Capsules and Spores of Mosses. Bryum capillare. Dicranum scoparium. Ilypnum rutabulum. Tortula unguiculata. Funaria hygrometrica. Thecae and Spores of Ferns, &c. From Pteris aquilina. From Polypodium vulgare. From Osmunda regalis. Platycerum alcecorne. Fungi, Blight, Mould, Mildew, &c. Smut in Ear and Grain of Wheat (Us- tilago segetum). Bunt fungus in Corn grains; Uredo foetida (or Tilletia caries). Rust or Brand on Leaf (Corn Mildew); Puccinia graminis. Red Rust Trichobasis rubigo-vera. Eels in Wheat, Vibrio tritici. Timber fungus, Arcyria nutans. Do. Stemonitis fusca. Spiral fungus, Trichia chrysosperma. Star fungus, Asterosporium Hoffmann. Chain-Brand, Xenodochus carbonarius. Section of Truffle. MICROSCOPIC OBJECTS. 73 P0LARIS00PE OBJECTS. 50 cents, 75 cents, and $1, Animal Substances. Palate of Haliotis tuberculata. Do. Limpet, Patella vulgaris. Do. Nassa reticulata. Do. Periwinkle, Littorina littoralis. Do. Trochus zizyphinus. Do. Whelk, Buccinum undatum. Claw of Ourang Outang, Lynx. Do. Sloth, Lioness, Wild Cat. Do. Fowl, Polar Bear, Seal. Finger Nail—Human. Cuttings. Toe Nail, Transverse Section. Corns of Elephant. Do. Human. Foot Pad of Dromedary, Cat. Hoof of Antelope, Elk, Pig, Ox. Do. Mustang, Reindeer, Zebra. Horn of American Bison. Do. Antelope, Brahmin Bull. Do. African Rhinoceros. Do. Indian Rhinoceros. Quill of Porcupine. Whisker of Walrus. Spines of Hedgehog. Do. Cat’s Tongue. Section of Cat’s Tongue, Nose and Lip. Bone of Cuttle Fish. Whalebone, Finland Whale. Do. Bottlenose. Do. Beluga Catodon. Embryo Oysters. Exuvium of Prawn. Teeth of Medicinal Leech. Tendon Achilles, Human. Tendon Ostrich. Leg of Dytiscus. Elytron of Dytiscus. Crystallization of the Fatty Acids. These preparations require to be warmed until the substance melts. Its crystallization may then be observed as it cools on the stage. Hard Acid from Human Fat. Do. Cotton Seed Oil. Margaric Acid from Olive Oil. Palmitic Acid from Palm Oil. Stearic Acid from Ruminants. Fine Transparent Injected Specimens, $1 50. Section of Cat’s Tongue. Do. Human Tongue. Do. Toe of White Mouse. Animal Substances (not injected), 50 cents to $1. Skin, Human (vertical section). Do. Negro Scalp, with incipient Curl in Roots of Hair. Do. Alligator, the Nile. Do. Giraffe, with Hair. Do. Lip of Calf, with Hair. Do. Lip of Cat, with Hair. Do. Nose of Cat. Do. Eel, with Scales in situ. Do. Sole, with Scales in situ. Do. Synapta, Anchors in situ. Scales of Carp, Eel, Perch, Sole, Gudgeon, and Mullet. Tail of Whitebait. Crystals of Carbonate of Lime, in Tail of Prawn and Shrimp. Plates from Skin of Holothuria. Anchors, &c. from Synapta. Hair, Human, White with Age. Do. do. Roots and Eyebrows. Do. do. Shavings of Beard. Do. do. Albino Girl. Do. do. Infant. Do. do. Young Lady’s Eyelash. Do. Gorilla. Do. Brahmin Bull. Do. Reindeer. Do. Polar Bear. Do. White Mouse. Do. Persian Cat. Do. Angora Goat, Mohair. Do. Elephant’s Tail, section. Genuine Crinoline. Indian Muslin (Woven Wind). Pine Apple Muslin, Philippines. Finest French Cambric, $10 00 per yard. Polariscope Objects Moving in Fluid, Animal Substances Mixed. Actinolite. Brazilian Pebble Fragments. Crystalline Sulphate of Lime. Fibrous Sulphate of Lime. Rolling Stones, various. Young Oysters. 74 MICROSCOPIC OBJECTS. POLABISCOPE OBJECTS. 50 cts. to $1. Chemical Crystals. 50 and 75 cents. Asparagine. Aspartic Acid. Bitartrate of Ammonia. Borax. Boracic Acid. Carbozotate of Potash. Carbonate of Lime, from Horse. Do. do. Boa Constrictor. Creatin. Cholesterin. Chlorate of Potash. Chloride of Barium. Cinchonine. Cinchonidine. Citric Acid. Ferri-cyanide of Potassium. Iodide of Potassium. Iodo-disulphate of Quinine. Murexide (Dichromatic). Naphthaline. Nitro-prusside of Sodium. Oxalate of Lime. Oxalate of Ammonia. Oxalate of Chromium and Potash. Oxalic Acid. Oxalurate of Ammonia. Platino-cyanide of Magnesia. Do. do. Barium. Do. do. Thallium. Plumose Quinidine. Quinidine. Santohine. Salignine. Salicine. Strychnine. Sugar. Sulphate of Cadmium. Do. Nickel and Potash. Do. Copper. Do. Spiral form. Do. Copper and Magnesia. Tartaric Acid. Thionurate of Ammonia. Triple Phosphate, various forms. Urea. Uric Acid. Uric Acid from Boa Constrictor. Wine Crystals. Bi tartrate of Potash. Vegetable Fibres in Balsam. Cotton. China Grass. Flax from Ireland and New Zealand. Hemp, Russia and Manilla. Jute Fibre, Calcutta. Silk, Indian, Chinese. Silk, Italian, British. Wool, British, Australian. Pyroxylin (Gun Cotton). Shoddy Fibre. Stones and Minerals. 75 cts. to $1. Actinolite. Avanturine. Agates, various. Asbestiform Serpentine. Carbonate of Lime. Carrara Marble. Gibralter Rock. Granite, various localities. Labrador Felspar. Jasper with Amethyst Quartz Rock, various. Quartsite, Mount Blanc. Satin Spar. Sandstone. Selenites, various colors. Sulphate of Baryta. Zeolite from Giant’s Causeway Vegetable Substances. Starch from Arrow Root. Do. Calabar Bean. Do. Colchicum autumnale. Do. Potato, Oats, Rice. Do. Sago, Palm, Tapioca. Do. Tous les Mois, Ginger. Do. Maize, Barley, Wheat. Section of Potato, Starch in situ. Starches also mounted in Fluid. Cuticle of Leaf of Correa cardinalis. Do. do. Deutzia scabra. Do. do. Elaeagnus. Do. do. Onosma taurica. Silicous Cuticles— From Araucaria imbricata. Do. Bamboo Cane. Do. Sugar Cane. Do. Equisetum arvense. Do. Dutch Rush, E. hyemale. Do. Indian Corn. Do. Canary Seed. Do. Husk of Rice Grain. Do. Straw of Rice. Do. Leaf of Wheat. Fibro cells from A3rides roseum. Do. do. Oncidium bicallosum. Scalariform vessels from Fern. Do. do. Dicksonia Antarctica Spiral do. Rhubarb. Fern Scales, Cheilanthes Eckloniana. Do. Elaphoglossum squamosum- Do. Notliochlaena maranta. Do. do. laevis. Stellate Hairs from Elaeagnus. Wing of Seed of Eccremocarpus. MICROSCOPIC OBJECTS. 75 VEGETABLE PBEPAEATIONS. 50 eta., 75 eta. and $1. The number 3 indicates that Three Sections of Stems are on one Slide Transverse, Vertical, and Radial. Arancaria excelsa, 3. Apple Tree, Pyrus malus, 3. Asparagus, Asparagus officinalis. Aristolochia sipho. Do. ornithocephalus. Do. Japan. Baobab Tree, Adansonia digitata. Berberry, Berberis vulgaris. Beech, Fagus sylvatica, 3. Brake Fern, Pteris aquilina. Brava, Cissampelos Pereira. Burdock, Arctium lappa. Butcher’s Broom, Ruscus aculeatus. Cane, Bamboo, 3. Bambusa, 3. Do. Malacca, Calamus scipionum. Do. Rattan, Calamus rotang, 3. Do. Sugar, Saccharum officinarum, 3. Do. Wanghae. Catalpa syringsefolia, 3. Cedar of Lebanon, Cedrus Libanus, 3. Cherry Tree, Cerasus communis, 3. Cinnamon, Cinnamonum Zeylanicum. Chili Pine, Araucaria imbricata, 3. Cocoa Nut Palm, Cocus comosa. Cork Tree, Quercus suber, 3. Cutleya Leopoldii. Dendrobium nobile. Do. speciosum. Dog Rose, Rosa canina. Dragon Tree, Dracoena ferrea. Date Palm, Phoenix humilis. Elder, Sambucus nigra, 3. Fennel, Foeniculum officinale. Fig Tree, Ficus carica. Gesnera grandis. Gum Tree, Eucalyptus, 3. Gutta Percha Tree, Isonandra gutta, 3. Grape Vine, Vitis vinifera. Hibiscus Africanus, 3. Ivy, Hedera helix. India-rubber, Ficus elastica. Jasmine. Jasminum officinale. Lavender. Lavandula vera. Lace Bark, Lagetta lintearia, 3. Land Rush, Juncus communis. Larch, Larix, 3. Larix Europseus, 3. Lemon Tree, Citrus limonum. Magnolia grandiflora. Mahogany, Swietenia mahagoni, 3. Maple, Acer campestre, 3. Mimosa Nilotica. Mulberry, Morus Nigra, 3. Miltonia cuneata. Misletoe, Yiscum album. Oak, Quercua pedunculata, 3. Orange Tree, Citrus aurantium, 3. Pampas Grass, Gynerium argenteum. Passion Flower, Passiflora quadrangularis. Pepper (Australia), Piper alba. Do. (Malacca), P. Nigrum. Pear Tree, Pyrus domestica. Pine, Pinus strobus, 3. Pine Apple, Ananas lucida. Pilea Smilacifolia. Plane Tree, Platanus Occidentalis, 3. Sanseviera Zeylanica. Sarsaparilla, Smilax officinalis. Satin Wood, Chloroxylon Swietenia. Screw Pine, Pandanus odoratissimus. Sea Rush, Juncus maritimus. Sunflower, Helianthus annuus. Sandal Wood, Santalum album, 3. Tea Tree, Lycium barbarum. Traveller’s Joy, Clematis vitalba. Upas (Java), Antiaris toxicaria, 3. Water Plantain, Alisma plantago. Water Lily, Nuphar luteum. Walnut, Juglans regia, 3. Wellingtonia gigantea, 3. Willow, Salix alba, 3. Yew, Taxus baccata, 3. Section of Petiole of Arum. Do. Cinnamon. Do. Date Palm. Do. India-rubber. Do. Oleander. Bulb of Orchid, sections. Pith of Rice Paper Tree. Root of Wellingtonia gigantea Root Fern, Pteris aquilina. Sections of Leaf, Vertical and Transverse. Of H5rides roseum and crispum. Of Dracoena Draco and ferrea. Of India-rubber Tree. Of Odontoglossum grande. Of Oncidium bicallosum. Of Saccolabium guttatum. Of Yanda Roxburghii. Of Lily. Of Hyacinth. Of Oleander. Of Wax Plant. Of Cactus. 76 MICROSCOPIC OBJECTS. VEGETABLE PREPARATIONS. 50 and 75 cents. Cuticles of Petals— From Geranium, Peony. Do. Pansy, Fritillaria. Do. Nasturtium and Verbena. Cuticles from Cherry, Plum. Do. Pitcher Plant. Do. Rhubarb. Potato. Do. Sugar Grass. Stomata in Cuticle of Orchid. Do. Aloe, Hyacinth, Lily. Do. Yucca, Oleander, Dog Rose. Spiral Vessels from Collomia Seed. Do. Rhubarb Stalk. Do. Compound, Nym- phasa edulis. Spiro-annular, Musa paradisiaca. Seed of Paulownia imperialis. Flower of Houstonia caerulea. Section of Hard Tissues. Betel Nut, Palm, Areca pumila. Vegetable Ivory Nut. Cuticle of ditto, Surface and vert. Shell of Cocoa Nut (vertical). Do. do. (surface). Do. Coquilla Nut, Attalea funifera. Do. Brazil Nut. Do. Mexican Gourd. Stone of Apricot and Cherry. Do. Damson and Peach. Elementary particles of Cherry Stone. Raphides in Cactus, Garlic. Do. Hyacinth, Onion, Pear. Do. Rhubarb, Squill, Rea. Do. Tabaiba, Water Lily. Pollens, Transparent. From Coboea scandens. Do. CEnothera. Do. Convolvulus, Geranium, Hollyhock. Do. Lily, Nasturtium, Flax. Do. Lobelia, Cuphea platycenta. Do. Mallow, Passion Flower, Dahlia. Do. Arum, Yucca, Vegetable Marrow. Abelmoschus manihot. Filaments from Stamens of Tradescantia, Scales from Ferns. Cheilanthes Eckloniana. Do. elegans. Ceterach officinarum. Goniophlebium sepultum. Niphobolus lingua. Nothochlaena ltevis. Do. maranta. Elaphoglossum squamosum. Sporules and Thecse of Ferns. From Pteris aquilina. Do. Polypodium vulgare. Do. Osmunda regalis. Fructification on Fronds of Ferns. Adiantum Capillus veneris. Asplenium Adiantum-nigrum. Athyrium Filix-femina. Crystopteris fragilis. Davallia Canariensis. Gymnogramma Laucheana. Lastrea Filix-mas. Pteris aquilina. Polypodium fragilis. Scolopendrium vulgare, and others. Platycerum alcecorne. Typical Illustrations of the Organic Structure of Plants. Simple Cellular Tissue (parenchyma) . in Rice Paper Plant. Isolated Cells ..... in Vegetable Ivory* Stellariform Cells .... in Common Rush. Fibro-cellular Tissue .... in Bulb and Leaf of Orchid. Fibro-cells separated .... from roseum. Do. do. .... from Leaf of Oncidium. Scalariform Vessels .... from Fern, Pteris aquilina. Single Spiral Vessels .... from Rhubarb and Seed of Callomia. Compound Spiral Vessels . . . from Nymphsea edulis. Spiro-annular Vessels . . . from Musa paradisiaca. Stomata in Cuticle .... of Leaf of Hyacinth and Aloe. Resin and Gum Cells .... in Pine Seed, and Stem of Eucalyptus. Muriform Cells ..... in Yellow Water Lily. Pitted Ducts or Glands ... in Radial Section of Larch, and Pine. Stem of Endogen, Vascular composition Screw Pine. Do. Exogen, Concentric annular layers Cedar of Lebanon. Petiole of Acrogen intermediate structure Pteris Aquilina. MICROSCOPIC OBJECTS. 77 MISCELLANEOUS OBJECTS. 75 cents. Viscid lines of Spider’s Web. Chirping File and Drum of Cricket. Buzzing Organ of Fly. Finest Tracing Paper. Bank of England Note Paper. Paper fabric of Wasp’s Nest. Mummy Cloth from Luxor. Papyrus from Egypt. Selenites, various colours, 75 cts. to $2 50. Ova of Lobster and Shrimp. Young Prawns, 1st Stage. Do. Crab, do. Parasite of Prawn, sexes. Section of William Penn’s Tree. Do. Cedar from Solomon’s Temple. Do. Incrustration in Steam Boiler. Collomia Seed to show development of Spiral Vessels, in fluid, 25 cents per packet. The Anatomy of an Insect complete on One Slidb. Each Composed of 10 to 15 Organs, $2 50, each. The Blow Fly. The Garden Spider. The Honey Bee. The Scorpion Fly. The Butterfly. The Earwig. EDUCATIONAL SERIES OF OBJECTS. SYSTEMATICALLY ARRANGED FOR INSTRUCTIVE ILLUSTRATION. Substances used in Felting and in Textile Fabrics. The Anatomy of an Insect complete (Blow Fly). The Development, Growth, and Structure of Human Bone. The Structure of Bone in Man, Mammals, Birds, Reptiles, Fish, &c. The Structure of Shell, Fish Scales, and the hard coverings of Animals. The Structure of Hairs, Feathers, &c. The Structure of Teeth in Man, Mammals, Reptiles, and Fish. Blood Disks from Man, Mammals, Birds, Reptiles, and Fish. A Series of Urinary Deposits in various Diseases. Diseased Structures; Kidney, Lung, Bone, Muscle, Cancel' Cells, &c. The Organic Structure and Fructification of Plants, exhibiting Cuticles, Hairs, Scales, Glands, Ducts, Cells, Stomata, Spiral and Scalariform Vessels, Fibro- Cellular Tissue, Fronds, Spores, Seeds, Pollen. OBJECTS FOR THE LANTERN AND OXYHYDROGEN MICROSCOPE. Almost any object having sufficient color and transparency may be mounted for the Lantern or the Oxyhydrogen Microscope. These are on Glass Circles. Price from $1 00 to $5 00. MOLLER’S DIAT0MACEEN TYPER PLATTE 1951. No. 1 contains over 400 arranged Diatoms, with handsomely bound explanatory book, $45 00 1952. No. 2 contains over 100 arranged Diatoms, with descriptive chart, . 20 00 Each slide is contained in a handsome morocco case. MOLLER’S PROBE PLATTE. 1953. Contains 20 Diatoms, graduated according to their value as test objects, 6 00 A printed description accompanies each slide. 1954. Nobert’s Test Lines, ruled upon glass, the most perfect of all tests, from 10,000 to 100,000 to the inch, including the 19th Band, . . 60 00 Note.—By special arrangement with Mr. Moller we are constituted his Sole Agents in America, and always have in stock all of his preparations. 78 BOOKS 1955. Cheap series of Educational Objects, including all the most interest- ing of ordinary insect and vegetable specimens, in neat rack boxes, containing one dozen specimens, $1 50; single slide, . $0 15 Foot of Fly, Do. Bee, Do. Spider, Do. Wasp, Do. Beetles. Scales of Moths, Do. Butterflies, Do. Fish, Do. Lepisma nairs of Bee, Do. Caterpillar, Hairs of Mouse, Do. Mole, Do. Bat, Do. Human,. Do. Vegetable. Eye of Butterfly, Do. Dragon Fly, Do. Blow Fly, Do. Bee, Do. Lobster, Do. Beetle. Legs of Spider, Do. Bee, Do. Fly, Do. Water Beetle. Tongue of Blow Fly, Do. Bee, Do. Wasp. Wings of Beetles, Do. Flies, Do. Wasps, Do. Bees, Wings of Mosquitoes, Do. Gnats, Ac. Stings of Bee, Do. Wasp, Do. Hornet. Petal of Geranium, Do. Deutzia, Ac. Leaves of Oleander, Do. Box, Do. Mosses. Seeds, Pollen, and Spores; a large variety. Sections of Wood in great variety. Louse, Bed Bug, Flea, Ant, Ac. 1956. A higher grade of the same, including many Animal and Diatomace- ous Objects, in neat rack boxes of one dozen, $2 50 ; single slide, . $0 25 We take pleasure in announcing that we have recently completed arrangements with Dr. Edward Curtis, formerly of the United States Army, and Dr. J. C. W. Kennon, until recently connected with the Army Medical Museum in Washington, by which we shall be continually supplied with their beautiful preparations of Human Anatomy, including opaque and transparent injections, preparations of the eye, brain and spinal cord, and an infinite variety of Pathological preparations. Our Mr. Walmsley will also continue to furnish his illustrations of Animal, Vegetable, and Insect Anatomy. His preparations wrere awarded the highest premium (Medal and Diploma), at the recent Fair of the American Institute, New York, and are at least equal to any imported. Mr. Arthur C. Cole, of Liverpool, England, will also supply us with his exquisite slides of arranged diatomaceae, polycistina, and foraminifera, which are quite unique in their general arrangement and finish. BOOKS ON OPTICS AND OPTICAL INSTRUMENTS. No. 1975. Brewster. A Treatise on Optics, by Sir David Brewster. New edition, 1853. 520 pages, fully illustrated, . . . . $2 50 $0 20 1976. Lawrence and Moon. Ophthalmic Surgery. Vision and Optical Defects of Vision, by Jno. Z. Lawrence, M.D., Robt. 0. Moon, M.D., 2 50 20 1977. Zander. The Ophthalmoscope : Its Varieties and its Use. Trans- lated from the German of Adolf Zander, by Robert B. Carter, F.R.C.S., etc., etc. With notes and additions by the translator, 4 00 40 1978. Hogg. The Ophthalmoscope: Its Mode and Application Explained, and its Value Shown in the Exploration of Internal Diseases alfectingtlie Eye. With colored illustrations. ByJabezHogg, 5 25 40 1979. Dick. The Telescope and Microscope. By Rev. Thomas Dick. 192 pages, 50 8 1980. Wood. Common Objects of the Microscope, with upwards of 400 illustrations. Bound in boards, ....... 50 8 1981. The same, with illustrations printed in colors, .... 75 1982. Wood. Common Objects of the Microscope, with illustrations printed in colors, handsomely bound in cloth, gilt, . . 1 50 12 1983. Davies. Hand-Book on Preparing and Mounting Microscopic Objects. By Thomas Davies, . . . . . . . 1 50 12 Price. Postage. BOOKS. No. Price. Postage. 1984. Hogg. The Microscope: Its History, Construction, and Appli- cation. Being a familiar Introdrfction to the Use of the In- strument and the Study of Microscopical Science, with Directions for Collecting, Preserving, and Mounting Objects. Illustrated with upwards of 500 engravings and colored illus- trations. 750 pages. Seventh London edition, 1869, . . $3 00 $0 36 1985. Beale. How to Work with the Microscope. By Lionel S. Beale, M.D., F.R.S. Fourth edition, with 400 illustrations. London, 1868, 8 00 40 1986. Beale. The Microscope, and its Application to Clinical Med- icine. By Lionel S. Beale, M.D., F.R.S. 2d edition. 390 pages, with 270 engravings, and a colored plate, . . . 7 00 40 1987. Quekett. A Practical Treatise on the Use of the Microscope, including the Different Methods of Preparing and Examining Animal, Vegetable, and Mineral Structures. By John Quekett. Last edition. Profusely illustrated. 550 pages, . . . 6 25 63 1988. Carpenter. The Microscope and its Revelations. Latest London edition. 434 illustrations. 776 pages, . . . 6 25 48 1989. Von Duben. Treatise on Microscopical Diagnosis. By Gustaf Von Dubens. Translated from the German, by Prof. Louis Bauer, M.D., 1 25 12 1990. Bird. Urinary Deposits. By Golding Bird, M.D., . . 3 25 30 1991. Mackenzie. The Use of the Laryngoscope in Diseases of the Throat. With an Appendix on Rhinoscopy. By Morell Mack- enzie, M.D., Physician to the Dispensary for Diseases of the Throat, etc., etc. In one volume, octavo, . . . . 2 00 20 1992. Alden. The Human Eye : Its Use and Abuse. A popular Trea- tise on Far, Near, and Impaired Sight, and the Methods of Preservation, by the Proper Use of Spectacles, and other ac- knowledged Aids of Vision, 1 50 12 1993. Griffith. Elementary Text Book of the Microscope, with a Description of the Methods of Preparing and Mounting Ob- jects, &c. With twelve colored plates, 451 figures. By J. W. Griffith, M.D., F.R.S., 3 75 20 1994. Cooke. Microscopic Fungi: An Introduction to the Study of Rust, Smut, Mildew, and Mould. Illustrated by nearly 300 figures, colored. By M. C. Cooke, author of British Fungi, &c., 3 00 20 1995. Richardson. Hand-book of Medical Microscopy. 40 Illustra- tions. By J. G. Richardson, M.D., . . . . . *. 2 25 16 1996. Ward. The Microscope. Profusely illustrated by Colored Plates. By the Hon. Mrs. Ward, 1 75 12 1997. Ward. Microscopic Teachings. With Colored Plates. By the Hon. Mrs. Ward, ......... 3 75 20 1998. Suffolk. On Microscopical Manipulation. Being the subject matter of a Course of Lectures delivered before the Queckett Microscopical Club. By W. T. Suffolk, F.R.M.S., with 49 En- gravings and 7 Lithographs, 2 00 16 1999. Gosse. Evenings at the Microscope. 477 pages. Profusely illustrated. By Phillip Henry Gosse, F.R.S., . . . 2 50 24 2000. Clarke. Objects for the Microscope. By L. Lane Clarke. 250 pages, 1 75 12 80 BOOKS. No. Price. Postage. 2001. Cooke. 1000 Objects for The Microscope with 400 Engravings. By M. C. Cooke, . . . . . . . . . $0 50 $0 08 2002. Pritchard’s Infusoria. The last London Edition, with Plates, . 25 00 2003. Griffith and Henfrey. The Micrographic Dictionary. 750 pp., 45 Plates, and over 800 Wood Cuts, . . . . . 22 50 2004. Harley and Brown. Histological Demonstrations of Microscopic Anatomy. Profusely illustrated. Last London Edition, . 6 00 20 2005. Nugent. A Treatise on Optics. By E. Nugent. 103 illustra- tions, 2 00 16 2006. Frey. Das Mikroskop, und die ’Iikroskopische Teclinik Ein Handbuch fur Aerzte und Studirende. 257 illustrations, 4 00 24 2007. Slack. Marvels of Pond Life. Plates, . . . 2 50 16 2008. Lankester. Half Hours with the Microscope ; being a popular guide to its use. By Edwin Lankester, M.D. A new edition, with profuse illustrations, . . . . . . 2 00 16 2009. Lardner. The Microscope. By Dr. Lardner, . . . . 1 00 12 2010. Sommerville. On Molecular and Microscopic Science. By Mary Sommerville. Illustrated; 2 volumes. London, 1869, . 10 50 48 2011. Monthly Microscopic Journal. Transactions of the Royal Microscopical Society. Edited by Henry Lawson, M.D. Monthly subscription price, per annum, . . . . . 10 00 24 2012. Quarterly Journal of Microscopical Science. Edited by Edwin Lankester, F.R.S., and George Bush, F.R.S., with wood cuts and lithographic illustrations. Published quar- terly. Subscription price, per annum, . . . . . 10 00 16 2013. Tyson. The Cell Doctrine, for use of Medical and Dental Students. Illustrated By James Tyson, M.D., . . . 2 00 16 2014. Beck. A Treatise on the Construction, Proper Use, and Capa- bilities of R. & J. Beck’s Achromatic Microscopes. By Richard Beck. Royal 8vo, with 27 plates, . . . . 8 00 36 2015. Martin. Microscopic Objects Figured and Described. By John H. Martin, ......... 7 00 36 All new works are added to our stock as soon as they appear. A CATALOGUE OP ACHROMATIC MICROSCOPES AND ACCESSORIES, MANUFACTURED BY R. & J. BECK, London, TO WHOM THE FOLLOWING MEDALS HAVE BEEN AWARDED FOR ‘THE EXCELLENCE OF THEIR MICROSCOPES.” THE COUNCIL MEDAL OF THE GREAT EXHIBITION OF 1851, THE FIRST-CLASS MEDAL OF THE FRENCH EXHIBITION OF 1855, THE PRIZE MEDAL OF THE INTERNATIONAL EXHIBITION OF 1862, THE GOLD MEDAL OF THE FRENCH EXHIBITION OF 1867. “ Vino bono non opus est hedera.” JAMES W. QUEEN & CO. SOLE AGENTS FOR THE UNITED STATES, 924 Chestnut Street, Philadelphia. 535 Broadway, New York. NOTICE. Having completed arrangements with Messrs. R. & J. Beck, whereby we are constituted special agents for the sale of all articles of their manufacture in the United States, it affords us pleasure to announce to our friends and the public generally, that we have now in stock, and shall hereafter keep on hand a full line of their goods, the prices of which are the same as those in London, United States duties and freight charges only being added. These goods are specially selected for our sales, and are guarantied to be only the first qualities of their respective grades. Having them always in stock, we are prepared to fill orders promptly, thus avoiding the vexatious delays our microscopists have so long been obliged to submit to in obtaining instruments and accessories. If it is desired, however, to import any article specially, we can do so at the shortest notice; in tljis case a pre-payment of one-half the amount of the order will be required. Under the New Tariff Act, Institutions of Learning, are entitled to import scientific instruments free of duty. We are prepared to receive and execute such orders very promptly. It is unnecessary for us to say aught in praise of the instruments manufac- tured by this eminent firm, whose fame is world wide. We would, however, call especial attention to their New Immersion Object-Glass, which, in every particular, is believed to be superior to any of similar power heretofore produced, whilst its price is but little more than half those of other makers. JAMES W. QUEEN & CO. B. A. 1. FIRST-CLASS MICROSCOPES. A Stand, of similar construction to those in this class, was shown by R. & J. B. at the Great Exhibition of 1851, and is thus mentioned by the Jury:— “ The Stand is excellent in principle ; the body, stage, and appliances beneath are all carried on one stout bar, on the recommendation of Mr. G. Jackson, by means of w hich the centering of the achromatic illumination is rendered easy and certain ; and on any tremor being communicated to the instrument, it is equally distributed over the whole of the working parts.” (Reports of the Juries, p. 266, Class X., No. 253.) Notice. The New Concentric Rotating Stage, with Iris Diaphragm, can be added to all the Improved Large Microscopes, Nos. A 1 to 8, at an additional cost of $50.00. B. A. i. Improved large Binocular Microscope, with all the Latest Additions, Complete, in which the magnifying power, the stand, the illumination, and all the accessory apparatus are carried to the greatest possible perfection. Price, $1300 00 In this instrument there are 9 Object-Glasses, viz. 3 (12°), l£ (23°), § (32°), fa (55°), (90°), J (15°), (100°), £ (120°), fa (140°), which, when successively combined with Eyepieces Nos. 1, 2, 3, 4, and 5, magnify from about 12 to 5000 times linear: be- sides these, there is also an Erecting Glass, which with the f Object-Glass and the Eye- pieces Nos. 1 and 2, magnifies from 5 to 150 times linear. Two Kelner's Eye-pieces for giving a large field. The Body has quick and slow motions, and a graduated sliding draw-tube, and is fitted with Wcnham’s Binocular, with rack adjustments to the draw-tubes, complete, and 3 pairs of Eyepieces. For direct illumination of transparent objects, there is an Achromatic Condenser, of an improved construction of two powers; it has a revolving diaphragm to give vari- ous illuminating pencils from 25° to 80°, with stops for the central rays, with complete adjustments. Also a Right-angle Prism for reflecting the light more perfectly than the flat mirror, with movements and fittings to the triangular mirror-stem, and the reflecting surface uncovered for the convenience of wiping; and a Brown's Iris Diaphragm. , For oblique illumination of transparent objects, Amicis and Nachet's Prisms are mounted on improved plans, the reflecting surface of both being uncovered. For “ dark field illumination,” Wenham’s Parabolic Reflector, and a Spot-Lens. Rainey’s Moderator, on Stand, and a White-ground Illuminator. The Polarizing Apparatus is complete, consisting of two Nicol's Prisms (an analyzer and an extra large polarizer) with revolving fittings, and DarJcer’s Series of Selenites, which give 13 different colors and their complementary tints, mounted on an im- proved plan, for their more easy and accurate appliance. Sorby’s Micro-Spectroscope. Sorby’s Standard Spectrum-scale. Sorby's Dichroiscope. Leeson's Goniometer. A Tourmaline. Two Double-image Prisms and Selenite Film, with fittings to eyepiece and brass plate with holes. A set of 6 Crystals for showing rings round the optic axis. *** The vertical and horizontal movements to the Stage of all the First-Class Microscopes can be given either by a Hackwork and Screw, or by White's Lever. The “Improved Large Microscope” (either Monocular or Binocular), with complete apparatus, can be packed for portability in a case measuring only 19 inches long by 9 inches wide, and 5 inches deep, for $26.00 extra. The Cases for all Instruments going to hot climates should be brass-bound, and all blocks screwed in. This adds $18.00 to the expense of Microscopes Nos. 3 to 6, and $15.00 to Nos. 7 and 8. R. & J. BECK’S CATALOGUE. 85 For opaque illumination, there are a large Bull's-eye Condensing Ijens on stand, a smaller Side Condensing Lens with ball and socket joint to limb, Side Silver Reflector with complete fittings, Parabolic Illuminator, with Sorby’s Reflector, Beck's Patent Il- luminator, and Lieberkuhns to the 1J; -fa, and J Object-glasses, together with 3 Dark Wells and Holder. The following are also supplied :— Opaque-Disk Revolver with three trays of Disks, Forceps, and bottle of Gold Size, in mahogany case, complete. Quadruple Nosepiece, in Aluminium, for changing either of four Object-glasses with- out the trouble of screwing or unscrew'ng. Wollaston's Camera Lucida, and a Neutral-Tint Glass Camera, for drawing objects. Eyepiece and Stage Micrometers, for measuring objects, the former mounted with Jackson’s adjusting-screw. Indicators to 5 Eyepieces, for pointing to any particular object in the field of view. A Set of Live Traps. A Lever Compressor, Wenham’s Compressor, and Parallel-plate Reversible Compressor. Screw Live-Box, Large and Small Live-Boxes. A Growing-Cell. Two Large Glass Troughs with wedge and spring complete, 2 Glass Plates with Ledge and Covers, and a set of Glass Tubes—for the examination of objects in fluid. Maltwood1 s Finder. A Frog Plate for showing the circulation of the blood. A Mineral-holder. A pair of Three-pronged Forceps. A Key for tightening the joint of the stand. A pair of Forceps fitted to the stage, and a pair of Brass Pliers. The whole packed in an Upright Spanish-Mahogany Case, with two boxes for con- taining the Apparatus. B. l. Improved large Binocular Microscope, Complete, in which the magnifying-power, the stand, and the illumination are carried to the greatest possible perfection, Price, ...... $1000 00 In this instrument there are 9 Object-glasses, viz. 3 (12°), lj (23°), f (32°), (55°), A (90°), £ (75°), i (100°), & (120°), (140°), which when successively combined with 3 pairs of Eyepieces, Nos. 1, 2, and 3, magnify from about 12 to 3000 times linear; besides these, there is also an Erecting Glass, which, with the $ Object-glass and the Eyepieces Nos. 1 and 2, magnifies from 5 to 150 times linear. The Body is fitted with Wenham's Binocular, with rack adjustments to the draw- tubes complete, has quick and slow motions, and a graduated sliding tube. For direct illumination of transparent objects, there is an Achromatic Condenser, of an improved construction, of two powers ; it has a revolving diaphragm to give various illuminating pencils from 25° to 80°, with stops for the central rays, with complete adjustments. Also a Right-angle Prism for reflecting the light more perfectly than-the flat mirror, with movements and fittings to the triangular mirror-stem, and the re- flecting surface uncovered for the convenience of wiping. For oblique illumination, of transparent objects, Amici's and Nachet's Prisms are mounted on improved plans, the reflecting surface of both being uncovered. For “ dark-field illumination,” Wenham’s Parabolic Reflector, and a Spot Lens. The Polarizing Apparatus is complete consisting of two Nicol’s Prisms (an analyzer and an extra large polarizer) with revolving fittings, and Barker’s Series of Selenites, which give 13 different colors and their complementary tints, mounted on an im- proved plan, for their more easy and accurate appliance. Two Double-image Prisms and Selenite Film, with fittings to eyepiece and Brass plate with holes. For opaque illumination, there are a large Bull’s-eye Condensing Lens on stand, a smaller Side Condensing Ijens with ball and socket joint to limb, Parabolic Illuminator, and Lieberkuhns to the lj, §, and \ Object-glasses, together with 3 Dark Wells and Holder The following are also supplied:— Opaque-Disk Revolver with three trays of Disks, Forceps, and bottle of Gold Size, in mahogany case, complete. Quadruple Nosepiece, for changing either of four Object-glasses without the trouble of screwing or unscrewing. Wollaston's Camera Lucida, for drawing objects. 86 R. & J. beck’s catalogue. Accessory Box, B. 1. Accessory Box, B. 1. R. & J. BECK’S CATALOGUE. 87 Eyepiece and Stage Micrometers, for measuring objects, the former mounted with Jackson’s adjusting-screw. An Indicator, to each of 3 Eyepieces, for pointing to any particular object in the field of view. The Lever Compressor, Wenham’s Compressor, and Parallel Plate Reversible Compressor. Screw Live-Box, Large and Small Live-Boxes. Large Glass Trough with wedge and spring complete, 2 Glass Plates with Ledge and Covers, and a set of Glass Tubes, for the examination of objects in fluids. Maltwood’s Finder. A Frog-plate for showing the circulation of the blood. A pair of Three-pronged Forceps. A pair of Forceps fitted to the stage, and a pair of Brass Pliers. The whole packed in an Upright Spanish-Mahogany Case, with two boxes for con- taining the Apparatus. B. 2. Improved Large Monocular Microscope, Complete, in which the magnifying-power, the stand, and the illumination are carried to the greatest possible perfection. Price, ....... $960 00 With the same Object-glass and Apparatus as No. 1. B. B. 3. Improved Large Binocular Microscope. Price, . . . . 650 oo In this instrument there are 5 Object-Glasses, viz, 1 \ (23°), $ (32°),(55°), (100°), and (120°), which when successively combined with 3 pairs of Eyepieces, Nos. 1, 2 and 3, magnify from about 20 to 1300 times linear; besides these, there is also an Erecting Glass, which, with the § Object-glass and the Eye-pieces Nos. 1 and 2, mag- nifies from 5 to 150 times linear. For direct illumination of transparent objects, there is an Achromatic Condenser of an improved construction, of two powers, and revolving diaphragm to give various illuminating pencils from 25° to 80°, with stops for the central rays, with complete adjustments. Wcnham's Parabolic Reflector, for dark field illumination. Polarizing Apparatus, complete, with extra-large polarizingprism and one selenite, kc. A large Bull's-Eye Lens, on a separate stand, a smaller Side Condensing Lens with ball-and-socket movements and fittings to the limb, and Lieberkuhns to \\, §, and Object-Glasses, with Dark Wells and Holder, for the illumination of opaque objects. Brooke's Double Nosepiece, for changing either of two Object-Glasses without the trouble of screwing or unscrewing. Camera Lucida, for drawing objects. Eye-piece and Stage Micrometers, for measuring objects, the former mounted with Jackson’s Adjusting Screw. Opaque Disk Revolver, with three trays of Disks, Forceps and bottle of Gold Size, in mahogany case, complete. Parallel-plate Reversible Compressor, Wenham's Compressor, Large and Small Live- Boxes, Large Glass Trough with wedge and spring complete, a set of Glass Fishing Tubes, and 2 Glass Plates, with Ledge and Covers for the examination of objects in fluid. Maltwood1 s Finder. A Pair of Forceps fitted to the stage, and a pair of Brass Pliers. The whole packed in an Upright Spanish-Mahogany Case, with one box for contain- ing the apparatus. B. 4. Improved Large Monocular Microscope. Price,.... $600 oo With the same Object-glasses and Apparatus as No. 3. B. B. 5. Improved Large Binocular Microscope. Price, . . . . 525 oo With 3 pairs of Eyepieces, and l£ (23°), § (32°), -fo (55°), and £ (100°) Object-glasses, magnifying, when successively combined, about 20, 45, 60, 80, 105, 180, 120, 210, 240, 350, 430 and 720 times linear, and the Erecting Glass, which, with the # Object-glass and the Eyepieces Nos. 1 and 2, magnifies from 5 to 150 times linear. Achromatic Condenser of two powers, with apertures of 20° and 60°, with adjusting- screws, for a more perfect illumination of transparent objects, Wenham's Parabolic Reflector, for dark-field illumination. Polarizing Apparatus complete, with Selenite, 4c. 88 R. k J. BECK’S CATALOGUE. A large Bull’s-eye Lens on a separate stand, a smaller Side Condensing Lens with ball- and-socket movements and fittings to the limb, and Lieberkuhns to 1£, § and Ob- ject-glasses, with Dark Wells and Holder, for the illumination of opaque objects. Brooke’s Double Nosepiece, for changing either of two Object-glasses without the trouble of screwing or unscrewing. Camera Lucida for drawing objects. Eyepiece and Stage Micrometers, for measuring objects, the former mounted with Jackson’s adjusting-screw. Wenham’s Compressor, Large and Small Live Boxes, Large Glass Trough, with wedge and spring complete, a set of Glass Fishing-Tubes, and 2 Glass Plates with Ledge and Covers, for the examination of objects in fluid. Maltwood’s Finder. A Pair of Forceps, fitted to the stage, and a pair of Brass Pliers. The whole packed in an Upright Spanish-Mahogany Case, with one box for containing the apparatus. B. 6. Improved Large Monocular Microscope. Price, . . $475 00 With the same Object-glasses and Apparatus as No. 5. B. B. 7. Improved Large Binocular Microscope. Price, . . . . 330 oo With 3 pairs of Eyepieces, and § (32°) and (85°) Object-Glasses, magnifying, when successively combined, about 60, 105, 180, 240, 430 and 720 times linear, and the Erecting Glass, which, with the § Object-glass and the Eyepieces Nos. 1 and 2, magni- fies from 5 to 150 times linear. Side Condensing Lens, with ball-and-socket movements and fittings to the limb, and a Lieberkuhn to § Object-glass, with Dark Wells and Holder for the illumination of opaque objects. Large Live-Box, and two Glass Plates with Ledges and Covers for objects in fluid. A Pair of Forceps fitted to the stage, and a pair of Brass Pliers. Packed in an Upright Honduras-Mahogany Case, with a box for holding the appa- tus. B. 8. Improved Large Monocular Microscope. Price, . . . $280 00 With the same Object-glasses and Apparatus as No. 7. B. B. 11. Improved Smaller Binocular Microscope. Price, . . . 600 00 3 pairs of Eye-pieces, and 1| (23°), § (32°), (55°), (100°) and £ (120°) Object- Glasses, magnifying, when successively combined, about 20, 45, 60, 80, 105, 180, 120, 210, 240, 350, 430, 720, 450, 760 and 1300 times linear, and the Erecting Glass, which,, with the § Object-glass and the Eyepieces Nos. 1 and 2, magnifies from 5 to 150 times linear. For direct illumination of transparent objects, there is an Achromatic Condenser, of an improved construction, of two powers, and revolving diaphragm to give various illuminating pencils from 25° to 80°, with stops for the central rays, with complete adjustments. Wenham’s Parabolic Reflector, for dark-field illumination. Polarizing Apparatus complete, with extra-large polarizing prism and one selenite, &c. A large Bull’s-eye Lens on a separate stand, a smaller Side Condensing Lens with ball- and-socket movements and fittings to the limb, and Lieberkuhns to lj, § and Ob- ject-glasses, with Dark Wells and Holder, for the illuminating of opaque objects. Brooke's Double Nosepiece, for changing either of two Object-glasses without the trouble of screwing or unscrewing. Opaque-Disk Revolver with three trays of Disks, Forceps and bottle of Gold Size, in mahogany case, complete. Camera Lucida, for drawing objects. Eye-piece and Stage Micrometers, for measuring objects, the former mounted with Jackson’s adjusting-screw. Parallel Plate Reversible Compressor, Wenham’s Compressor, Large and Small Live- Boxes, Large Glass Trough with wedge and spring complete, a set of Glass Fishing- Tubes and 2 Glass Plates with Ledge and Covers, for the examination of objects in fluid. MaltwoocFs Finder. A Pair of Forceps fitted to the stage, and a pair of Brass Pliers. The whole packed in a strong Flat Spanish-Mahogany Case, with covered dovetails. R. k J. beck’s catalogue. 89 b. 12. Improved Smaller Monocular Microscope. Price, . . $560 oo With the same Object-glasses and Apparatus as No. 11. B. B. 13. Improved Smaller Binocular Microscope. Price, . . .480 oo With 3 pairs of Eyepieces, and 1J (23°), f (32°), (55°) and (100°) Object-Glasses, magnifying, when successively combined, about 20, 45, 60, 80, 105, 180, 120, 210, 240, 350, 430 and 720 times linear, and the Erecting Glass, which, with the § Object-glass and the Eyepieces Nos. 1 and 2, magnifies from 5 to 150 times linear. Achromatic Condenser of two powers, with apertures of 20° and 60, with adjusting- screws, for a more perfect illumination of transparent objects. Wenham's Parabolic Reflector, for dark-field illumination. Polarizing Apparatus complete, with Selenite, J-inch, $ c. 4 00 4 00 R. A J. BECK’S CATALOGUE. 95 APPARATUS. B. 66. Sorby’s Spectroscope Eyepieces, for the Microscope, ia Mahogany Case. (See “ Popular Science Review,” No. 18), , $50 00 B. 67. Sorby’s Dichroiscope, .......... 8 50 B. 67*. Sorby’s Standard Spectrum-scale, ....... 8 50 B. 96. Orthoscopic Eyepieces, giving a very large field, each, . . . 8 50 B. 97. Eyepieces for the Improved Large Microscope, each, . . . 7 00 B. 98. Eyepieces for the Improved Smaller Microscope, each, . . . 6 00 B. 99. Erecting-glass, ........... 8 00 B. 100. Draw-tube for First-and Second-Class Microscopes, . . . 4 25 B. 101. Achromatic Condenser, with Revolving Diaphragm, with Stops, aper- ture from 25° to 80°, complete Adjustments, applicable to the First- Class Stands only, 40 00 B. 102. Achromatic Condenser, without Diaphragm, aperture from 20° to 60°, complete Adjustments, applicable to the First- and Second-Class Instruments, ........... 20 00 B. 104. Right-angle Prism, for reflecting the light more perfectly than the Flat Mirror, for the First-Class Stands only, . . . . 20 00 B. 105. Amici’s Prism, for oblique light, for the First-Class Stands only, . 18 00 B. 106. Amici’s Prism, on Separate Stand, ...... . 18 00 B. 107. Nachet’s Prism, for oblique light, 8 50 B. 108. Wenham’s Parabolic Reflector, for the First-Class Stands, . . 15 00 B. 109. Wenham’s Parabolic Reflector, for the Second-Class Stands, . . 15 00 B. 110. Spot Lens, mounted in brass fitting, ....... 4 50 B. 113. Brown’s Iris Diaphragm, . 18 00 B. 115. Polarizing Apparatus, with 1 Film of Selenite, . . . . . 20 00 B. 116. Polarizing Apparatus, with extra-large Polarizing Prism, . . 35 00 B. 117. Darker’s Series of Selenites, adapted for the First-Class Stands only, 30 00 B. 118. Selenite Film, of two colours, ........ 2 00 B. 119. Selenite Stage, Red and Green or Blue and Orange, each, . . 3 00 B. 120. Darker’s Selenite Stage, giving 13 tints, . . . . . . 18 00 B. 121. Black Glass, for Polarizing Light, ....... 5 00 B. 122. Bundle of Glass, for Polarizing Light, ...... 8 50 B. 123. Two Double-Image Prisms and Selenite Film, with fittings ta Eye- piece, and brass plate with holes, . 18 00 B. 123*. Single Double-Image Prism, in fitting, ... 8 00 B. 124. Crystals to show rings round the Optic Axis each, . 4 25 B. 125. Tourmalines, each, .......... 8 00 B. 126. Beck’s Patent Illuminator, in a brass box, for viewing Objects as Opaque under high powers, ........ 4 50 B. 127. White-cloud Illuminator, 4 50 B. 128. Parabolic Illuminator, fitted to the lj-inch and f-inch Object-glasses, 9 00 B. 129. Parabolic Illuminator, same as No. 128, with the addition of Sorby’s Reflector, 18 00 B. 130. Large Bull’s-eye Condensing Lens, on stand, . . . . . 9 00 B. 131. Smaller Condensing Lens, with Fitting to Limb of the First-Class Stands, . 8 00 B. 132. Smaller Condensing Lens, on Stand, ...... 5 00 B. 133. Side Silver Reflector, with Fittings to Limb of the First-Class Stands, 9 00 B. 134. Side Silver Reflector, on Stand, 9 00 B. 135. Rainey’s Moderator, on Stand, 9 00 B. 136. Three Dark Wells and Holder, ........ 5 00 B. 137. Opaque-Disk Revolver, one Tray of Disks, in Case, . . . . 15 00 B. 138. Opaque-disk Revolver, with 3 trays of Disks, Forceps, Capsule of Gold Size, in Mahogany Case, complete, 30 00 B. 139. Opaque-disk Revolver and Forceps, . • 9 00 B. 140. Boxes containing 24 Disks, 5 00 B. 141. Trays containing 24 Disks, ...... . 5 00 B. 142. Three-pronged Forceps, in German Silver, with Screw Adjustment. 7 00 B. 143. Three-pronged Forceps, ......... 6 00 B. 144. Stage Forceps, 3 25 B. 145. Stage Mineral-holder, 8 50 96 R. & J. BECK’S CATALOGUE. B. 146. Eyepiece Micrometer, with Jackson's Adjusting Screw', . . . $8 50 B. 147. Stage Micrometer, mounted in brass, . . . . . . 4 00 B. 148. Stage Micrometer, mounted in card, . . . . . . . 2 00 B. 150. Maltwood’s Finder, in case, 3 50 B. 152. Indicator to each Eyepiece, 2 00 B. 154. Leeson’s Goniometer, 20 00 B. 155. Wollaston’s Camera Lucida, ........ 8 00 B. 156. Neutral-tint Glass Camera Lucida, . . . . . . . 3 50 B. 157. Steel-disk Camera Lucida, ........ 6 00 B. 159. Brooke’s Double Nosepiece, . . . . . . . . 12 50 B. 160. Quadruple Nosepiece, ......... 28 00 B. 161. Quadruple Nosepiece, in Aluminium, . . . . . . 40 00 B. 162. Lever Compressorium, ......... 8 00 B. 163. Parallel Compressor, .......... 8 50 B. 164. Reversible Compressor, ......... 8 50 B. 165. Wenham’s Compressorium, for use with Wenham’s Parabola, . . 3 50 B. 166. Screw Live-box. .......... 6 00 B. 167. Large Live-box, . . . . . . . . . . 3 75 B. 168. Smaller Live-box, .......... 2 75 B. 169. Large Glass Trough, with Wedge and Spring complete, . . . 3 75 B. 170. Smaller Glass Trough, with Wedge and Spring complete, . . 2 75 B. 171. Glass Slip, with Ledge ...... * . . 50 B. 172. Growing-cell, for preserving objects alive in water for many days, . 4 50 B. 173. Set of Six Live-traps and Trough, in Case, complete, . . . 12 50 B. 174. Live-trap, 3 00 B. 175. Frog-plate, with Bag, &c., complete, ....... 4 50 B. 176. Glass Slip, with Hollow and Ledge, ....... 75 B. 177. Glass Slip, with Hollow and Ledge and Lip, . . . . . 2 00 B. 180. Glass Tubes, Set of Three, ........ 75 B. 181. Key for Tightening joint of First-Class Instruments, . . . 2 00 B. 182. Opal Glass, for moderating the light, 3X1 inch, .... 50 B. 183. Blue Glass, for moderating the light, 3X1 inch, .... 50 B. 186. Astral Oil Lamp, with flat wick, . . . . . . . 6 00 B. 190*. Lamp Chimneys for No. 186, ........ 25 B. 191*. Flat Wicks for No. 186, per dozen, 25 B. 191. Gallon Can of Astral Oil, ......... 1 00 THIRD-CLASS MICROSCOPES. B. 220. The Binocular Popular Microscope. Price, .... $125 00 With 2-inch, 1-inch, and }-inch Object-glasses, having the respec- tive apertures of 10, 22, and 75 degrees, and 2 pairs of Eyepieces; a new improved Stand with arrangement for varying the position, quick and slow motions to the body; Stage with improved object-holder and concentric revolving fitting; Concave Mirror with complete adjust- ments ; a Side Condensing Lens on Stand; Diaphragm with perforated revolving disk; improved Forceps ; Glass Plate, and a pair of Pliers, packed in a strong French-polished Mahogany Case, with brass hooks, a good lock and strong handle, together with Two Trays provided with the necessary fittings for the complete series of Object glasses and Apparatus. B. 221. The Binocular Popular Microscope. Price . . . 85 oo With 2-inch Object-glass ; one pair of Eyepieces ; Concave Mirror; Side Condensing Lens on Stand ; Diaphragm ; Forceps : Glass Plate, Pliers, &c., in Mahogany Case. B. 222. The Monocular Popular Microscope. Price, . . . 85 oo With 1-inch and J-inch Object-glasses; 2 Eyepieces; Concave Mirror ; Side Condensing Lens on Stand ; Diaphragm ; Forceps ; Glass Plate, Pliers, &c., in Mahogany Case. R. & J. BECK S CATALOGUE. 97 B. 220. B. 223. The Binocular Popular Microscope Stand, with one pair of Eyepieces; Concave Mirror; Diaphragm; Forceps; Glass Plate, Pliers, &c., . $75 00 B. 224. The Monocular Popular Microscope Stand, with One Eyepiece ; Con- cave Mirror ; Diaphragm ; Forceps ; Glass Plate, Pliers, &c., . 45 00 B. 225. Mahogany Case for the Popular Microscope, . . . . . 6 50 B. 226. Side Condensing Lens, on Stand, 3 50 B. 227. Improved Stage-Forceps, 2 00 B. 251. Stage, with Horizontal and Vertical Mechanical Movements, Sliding Object-holder, and Revolving Fitting, complete, . . . 22 50 98 R. k J. beck’s catalogue. PRICE LIST OF OBJECT-GLASSES AND LIEBERKUHNS. No Focal length. Linear magnifyin ; power nearly, with eyepieces. Degrees of angle of aperture. Price. No. Object- glass. Price. Draw-tubes No. 1. No. 2. $ C. $ c. B. 229. 3 in. closed 12 20 8 18 00 B. 230. 2 in. closed 24 40 10 14 00 B.231. in- closed 29 48 15 22 00 B.237. l£-in- 4 00 B.232. 1 in. closed 55 90 22 22 00 B.238. 1-in. 3 25 B.233. £ in. closed 120 200 40 22 00 B.239. J-in. 3 25 B. 234. i in. closed 210 350 75 22 00 B. 235. i in. closed 420 700 85 44 00 B. 236. sV ifl- closed 800 1200 100 70 00 ADDITIONAL APPARATUS. B. 238. Lieberkuhn to 1-inch Object-glass, ... . . $3 25 B. 240. Dark Well 1 75 B. 241. Achromatic Condenser and Fitting, ....... 8 50 B. 242. Wenham’s Parabolic Reflector, for Dark-field Illumination, . . 8 50 B. 243. Flat Mirror (in which case a double one is substituted for the concave single one, which has to be returned), . . . . . . 3 00 B. 244. Polarizing Apparatus, complete with Prisms, Plate of Selenite and Adapter, 15 00 B. 245. Wollaston’s Camera Lucida, for drawing an object, . . . . 6 50 B. 246. Glass Micrometer, ruled into and of an inch, . . 2 00 B. 247. Small Live-box, 2 00 B. 248. Glass Trough, complete with Wedge and Spring, . . . . 2 75 B. 250. All the above Additional Apparatus, from Nos. 238-248, if ordered at once, 40 00 B. 260. The Educational Microscope. Price, 85 oo With 1-inch and J-inch Object-glasses, having the respective aper- tures of 22 and 75 degrees, and 2 Eyepieces ; a firm Stand with a joint for varying the position, quick and slow motions to the body, a Stage with springs that allow any motion to be given to the object; a Supplementary Stage ; Concave Mirror with complete adjustments ; a Side Condensing Lens; Diaphragm with a Shutter; Forceps; Glass Plate, and a pair of Pliers, packed in a strong Mahogany Case. B. 261. The Educational Microscope Stand. Price, . . . 45 oo With two Eyepieces; Supplementary Stage ; Concave Mirror ; Side Condensing Lens ; Diaphragm ; Forceps ; Glass Plate and Pliers, in a strong Mahogany Case. B. 262. Eyepieces for Educational Microscope, . . . . . 5 00 ADDITIONAL APPARATUS. —The same as with the Popular and at same prices. B. 269. Mahogany Board, required for packing any of the additional pai'ts, . 3 00 B. 272. Springs for Stage of Educational Microscope, each, . ... 50 B. 260. a. A J. beck’s catalogue. 99 B. 275. 100 R. 4 J. BECK S CATALOGUE. F0UKTH-CLASS MICROSCOPES, B. 275. The Fnlversal Microscope. Price, $45 oo The Stand with firm circular base; an axis for inclination, quick and slow motions to the body ; Stage with object-holder and spring; Diaphragm with shutter; Concave Mirror in a semi-circle and on a sliding tube; Side Condensing Lens with complete ball and socket movements; 1-inch and |-inch Object-glasses; two Eyepieces; Pliers; Forceps; and Glass Plate; the whole packed in an Upright Mahogany Case. ADDITIONAL APPARATUS. B. 245. Wollaston’s Camera Lucida, for drawing an object, . . . . 6 50 B. 246. Glass Micrometer, ruled into, ths and °f an inc*L • • 2 00 B. 248. Small Glass TrougJi, 2 75 B. 280. Third Eyepiece, ........... 4 50 B. 281. Wenham’s Parabolic Reflector, for Dark-field Illumination, . . 8 50 B. 282. Flat Mirror (in which case a double one is substitute for the single concave one, which has to be returned), 3 00 B. 283. Polarizing Apparatus, complete with Prisms and Selenite, . . 15 00 B. 284. Dark Well for Lieberkuhns, ........ 1 75 B. 285. Small Live-box, 2 00 B. 288. Small Box for Additional Apparatus, . . . . . . 3 00 B. 290. Lengthening Tube, to increase the Magnifying-Power, . . . 1 50 B. 292. All the above Additional Apparatus, if ordered at once, . . . 40 00 PRICES OF OBJECT-GLASSES. No. Focal Length. Linear magnifying power, with eye- pieces, No. 1. No. 2. No. 3. Angle of aper- ture. Price. $ c. f Without lengthening ) B. 294. 2 inches tube, 20 30 50 r 9 12 00 1 With lengthening tube, 35 50 95 J f Without lengthening ) B. 295. 1 inch tube, 45 60 120 V 25 12 00 1 With lengthening tube, 80 110 220 J f Without lengthening ) B. 296. i inch 7 tube, 85 120 240 )■ 45 20 00 1 With lengthening tube, 150 200 400 i f Without lengthening ) B. 297. 4 inch 7 tube, 140 200 400 r 75 12 00 1 With lengthening tube, 230 320 640 i f Without lengthening ) B. 298. } inch 4 tube, 300 410 820 V 85 34 00 1 With lengthening tube, 500 700 1400 i PRICES OP LIEBERKUHNS. No. Object-glass. Price. No. Object-glass. Price. B. 299. 1-inch $3 25- B. 300. J-inch $3 25 R. A J. BECK’S CATALOGUE. 101 ADDITIONS TO STAND. B. 303. Binocular Body, with Adjustment for distance off eyes ; Revolving Disk for Three Object-glasses ; complete fittings for Prism, and Two extra Eyepieces, $45 00 B. 304. The Combined Body, with Revolving Disks, capable of receiving Three Eyepieces and Three Object-glasses at the same time, . 15 00 B. 305. Stage, with Vertical, Horizontal, and Revolving Movements, the latter being always central with axis of body, 22 50 B. 303. B, 306, SINGLE MICROSCOPES. b. 306. Improved Dissecting Single Microscope. Price, . . $45 00 Stand with complete sliding and revolving Stage-plates ; One Arm to carry the lenses, with rack-and-pinion adjustment; Side Conden- ser on lengthening arm; Mirror with complete adjustments; Two single lenses and Two Coddingtons, f and £-inch focus, the whole packed in a strong Mahogany Case. 102 R. & J. BECK’S CATALOGUE. ADDITIONAL APPARATUS B. 309. Coddington Lens, 1-inch focus, $6 00 B. 310. Coddington Lens, f-inch focus, ........ 6 00 B. 311. Coddington Lens, f-inch focus, ....... 6 50 B. 312. Holder for Glass Slips, 2 00 B. 313. Two Brass Saucers with Glass Bottoms, . . . . . . 3 00 B. 314. Two Flat Glasses, 1 00 B. 315. Two Concave Glasses, 2 00 B. 316. One Piece of Box-wood covered with Cork, . . . . . 1 00 B. 317. One Gutta-Percha Tray loaded with Lead, . . . . . 1 00 B. 318. One Piece of Lead and Cork, 1 00 B. 319. One Pair of Steel Forceps, ..125 B. 320. Two Pairs of Scissors, 3 50 B. 321. One Needle-holder, .......... 2 00 B. 322. Two Knives, . . ’ . . 2 50 B. 323. Two Hooks, . . . . . . . . . . . 2 00 B. 324. Two Points, ........... 2 00 B. 325. Wooden Tray for holding Dissecting-Instruments, . . . . 3 00 B. 326. Box for containing Additional Apparatus, . . . . . 3 00 B. 327. All the above Additional Apparatus, from Nos. 309-326, if ordered at once, ............ 40 00 B. 328. Binocular Prisms and Arm for carrying ditto, . . . . 22 50 B. 343. Combination of Three Lenses, mounted in Tortoise-shell, on Brass Stand, with Adjusting Arm and Sliding Forceps for holding an objedt, 12 00 B. 344. Combination of Three Lenses, in Tortoise-shell, on Brass Stand, with Adjusting Arm, ......... 8 00 B. 346. Combination of Three Lenses, mounted in Tortoise-shell, for pocket, 5 00 B. 347. Coddington Lens, f-inch focus, mounted in Silver, . . . 10 00 B. 348. Coddington Lens, |-inch focus, mounted in Aluminium Bronze, . 10 00 B. 349. Coddington Lens, f-inch focus, mounted in German Silver, . . 8 00 B. 350. Coddington Lens, focus, mounted in Gold, . . . . 25 00 B. 351. Coddington Lens, f-inch focus, mounted in Silver, . . . . 9 00 B. 352. Coddington Lens, |-inch focus, mounted in Aluminium Bronze, . 8 00 B. 353. Coddington Lens, f-inch focus, mounted in German Silver, . . 6 50 CODDINGTON LENSES, &c. MOUNTING MATERIALS. B. 360. Collection of Mounting-Materials and Dissecting Instru- ments. Price, $100 00 Consisting of Wood-cutting Instrument and Chisel; Instrument for cutting circles of thin Glass; Glazier’s Diamond; Writing Diamond; Cell-making Instrument; Brass Table and Lamp; Page’s Forceps; Case of Dissecting-Instruments, containing 4 Knives, 2 Hooks, 2 Points, 3 pairs of Scissors, 3 pairs of Forceps, and Needle-holder; Valen- tin’s Knife; 1 oz. Thin Glass; 9 dozen Slips, 3 inch by 1 inch; 3 dozen Wooden Slips; 3 dozen Cells; 200 Labels; 5 Capped Bottles, containing Canada Balsam, Asphalt, Gold Size, Glycerin, and Marine Glue; Bottle of Deane’s Medium; 3 Stop- pered Bottles for containing Chloroform, Nitric Acid, and Liq. Potassae. The whole packed in a strong Dovetailed Mahogany Case. B. 361. Collection of Mounting-Materials. Price, .... $45 oo Consisting of Writing Diamond; Cell-iftaking Instrument; Brass Table and Lamp; Page’s Forceps; Case for Dissecting-Instruments; 1 oz. Thin Glass; 6 dozen Slips, 3 in. by 1 in.; 3 dozen Wooden Slips; 2 dozen Cells; 150 Labels; 5 Capped Bottles, containing Canada Balsam, Asphalt, Gold Size, Glycerin, and Marine Glue; Bottle of Deane’s Medium. The whole packed in a strong Mahogany Case. R. & J. beck’s catalogue. 103 B. 362. Collection of Mounting-Materials. Price, . . . . $25 oo Consisting of a Writing Diamond; Cell-making Instrument; Brass Table and Lamp; Page’s Forceps; J oz. Thin Glass; 3 dozen Slips, 3 in. by 1; 1 dozen Cells; 100 Labels; 5 Bottles, containing Canada Balsam, Asphalt, Gold Size, Glycerin, and Marine Glue; Small Bottle of Deane’s Medium. The whole packed in a Mahogany Case. B. 368. Improved Wood-cutting Machine, with Chisel, packed in Mahogany Case, $12 00 B. 491. B. 491. Revolving Table, especially arranged for Microscopic purposes, in Walnut, Rosewood, Mahogany, or Oak, with handsome Leather Top, Gilt Border, 70 00 B. 492. Iron Centre, for the above, 10 00 B. 495. Walnut-wood Stand, with Leather Top, on Rollers, to carry a Mi- croscope and Lamp round a Table, . 9 00 B. 496. Bell-Glass Shade and Stand, with handsome Leather Cover, to place over a Microscope 10 00 GENERAL REMARKS. The difference in the price of “ First-class Microscopes,” as numbered in this Cata- logue, is dependent upon the number of Object-Glasses and the amount of Apparatus supplied, the quality being the same throughout. The Eye-pieces should be frequently wiped with a clean cambric handkerchief, or a piece of soft wash leather. The Object-Glasses should never be touched, except by the makers. Full instructions, as to the best mode of using all the foregoing instruments, are given in Richard Beck’s Treatise on the Construction, Proper Use and Capabilities of R. & J. Beck’s Achromatic Microscopes. Royal 8vo, with 27 plates. Price, $8.00. INDEX. Achromatic Condensers 38 Achromatic Marine, Field and Opera Glasses 17-21 Achromatic Object-Glasses for Mi- croscopes 44, 45 Achromatic Object-Glasses for Tel- escopes 4 Achromatic Oblique Prism 38 Achromatic Spy-Glasses and Teles- copes 13, 14 Air Pump 49 Amici’s Prism 38 Animalcule Cages 38, 45 Artificial Human Eyes 11 Asphalte 50 Astronomical Telescopes 15 Balsam, Canada 49 Beck’s, R. & J., Microscopes 81-103 Bell’s Cement 50 Bell-Glass 49 Books..' 78, 80 Brass Table 48 Brunswick Black 50 Bull’s-Eye Condenser 38, 45 Cabinet, Mounting 52, 53 Cabinets and Cases, for Microscopic Objects 57 Camera Lucidas 23, 38, 49 Camera Obscuras 23 Canada Balsam 49 Capped Bottles 50 Cases of Dissecting Instruments 47, 48 Cases for Microscopes 38 Do. Spectacles 11 Cells, Glass, Tin and Horn 49 Cements for Mounting 50 Circle Cutter 50 Clamp for Telescopes ; 14 Claude Lorraine ; or, Landscape Mir- rors 23 Clinical Microscope 38 Coddington Lenses 27 Collecting Boxes and Bottles 51 Do. Cases and Satchels 52 College Microscope 29, 30 Collins’s Microscope 41, 42 Color Blender 5 Compressorium 45 Compressors, Spring 45 Condenser, Bull’s-Eye 38, 45 PAGE. Cosmorama Lenses 4 Crouch’s Microscopes 40 Damar, for Mounting 49 Demonstration Lenses 4 Diagonal Mirrors 23 Diamonds, Glaziers’ and Writing... 50 Diatom Prism, Reade’s 53 Dissecting Instruments, in cases....47, 48 Do. Knives 47 Do. Microscopes 43 Do. Needles 47 Do. Scissors 46,47 Do. Troughs 48 Double Nose Piece 53 Dropping Bottles 51 Do. and Dipping Tubes 49 Educational Microscope 34 Elbow Scissors 47 Engravers’ Glasses 27 Entomological Pins 24 Erector 38 Eye-Glasses 10, 11 Eye, Model of. 3 Eye, Map and Diagram of 3 Eye-Piece Micrometers 38 Do. for Microscopes 38, 45 Do. for Telescopes 15 Eye Protectors 11 Eyes, Artificial 11 Field and Marine Glasses 17 Finders, Maltwood’s.. 45 Flower Microscopes 2J3 Fluids, Preservative for Mounting... 50 Forceps, Brass 45 Do. Double, Platina Points 46 Do. Nickel Plated 46 Do. Quekett’s 46 Do. Stage 38, 46 Do. Steel 45, 46 Gas Lamp 50 Glass Rings for Cells 49 Glass Slips, Plain, Ground Edges, Concave Centres 48, 49 Glass, Thin, Sheets, Squares and Circles 49 Glass, Watchmakers and Engravers. 27 Glasses for Spectacles 11 Glycerin 50 Glycerin Jelly 50 Glue, Marine 50 PACK. 106 INDEX. Gold Size 50 Hand Glasses, 10, 11 Hartnack’s Microscopes 39 Injecting Syringe 48 Kaleidoscopes 23 Kaleidoscope Top 5 Knife, Valentin’s 47 Knives, Dissecting 47 Do. Section Cutting 48 Labels and Covers 60 Lamp, Gas 50 Do. Spirit 48 Do. Student’s 54 Laryngoscopes 56 Lenses, Cosmorama 4 Do. Coddington '. 27 Do. Demonstration 4 Do. Microscope and Telescope.. 4 Do. Reading and Picture 16 Do. Stanhope 27 Linen Provers 27 Maltwood’s Finder 45 Map, or Diagram of the Eye 3 Marine and Field Glasses 17 Do. Glue 50 Micrometers, Stage and Eye-Piece.. 38 Microscope Cases 38 Do. Objectives, Acbromatic.44, 45 Microscopes, Compound:— Binocular ....40, 42 Collins’s 41, 42 Crouch’s 40 Dissecting 43 Hartnack’s 39 Monocular 31, 40 Nachett’s 38 Non-Achromatic 31 Queen’s Student’s 33 Do. Family 35 Do. Universal Household... 32 R. & J. Beck’s 81-103 The Educational 34 Zentmayer’s 36, 38 Microscopic Objects 61-78 Do. Specimen Cabinets and Cases 55 Microscope Lenses 4 Do. The 25 Microscopes, Simple 26-30 Do. do. Flower 26 Do. do. Pocket 26 Do. do. Seed 26 Do. do. The College 29, 30 Do. do. The School 28 Do. do. Three Legs 26 Mirrors, Claude Lorraine 23 Do. Magnifying, Multiplying and Cylindrical 24 Model of the Eye 3 Moller’s Type and Test Plates 77 Mounting Stands 48 Do Cabinets 52, 53 PAGK. Nachett’s Microscopes 38 Needles, Dissecting 47 Nicol’s Prisms 56 Nobert’s Test Lines 77 Norremberg’s Polariscope 55 Nose Glasses 10, 11 Nose-Piece, Double 53 Object-Glasses for Telescopes 4 Do. Microscopes...4, 44, 45 Objects, Microscopic 61—T7 Opera Glasses 17-21 Ophthalmoscopes 56, 57 Optical Toys 24 Parabolic Illuminator 38, 53 Pebbles 11 Periphanoscope 24 Picture Lenses 16 Pictures for Diagonal Mirrors 23 Pillar and Distorted Pictures 24 Pins, Entomological 24 Pippets ► 49 Pocket Microscopes 26 Polemoscopes 24 Polariscope, Norremberg’s 55 Do. Savant’s Black Mirror. 55 Do. Tourmaline 55 Polyprism 5 Polarizing Apparatus 38, 55, 56 Preservative Fluids 50 Prisms, 5, 38, 55, 56 Protectors for the Eye, Wire Gauze 11 Punches 50 Quekett’s Forceps 46 Queen’s Microscopes 33, 35, 43 Do. Microscope Object-Glasses 44 Do. Collecting Cases and Sat- chels 52 Queen’s Microscopic Objectives 44 Reade’s Diatom Prism 53 Reading and Picture Lenses 16 Savant’s Black Mirror Polariscope... 55 School Microscopes 28 Scissors, Dissecting 46, 47 Section Cutter 48 Seed Microscopes 26 Selenite Designs 56 Do. Plates and Stages 38 Shades, Silk 11 Shellac Cement 50 Spectacle Glasses 11 Do. Cases 11 Spectacles, German Silver 9 Do. Gold 5, 6 Do. Hand and Nose 10, 11 Do. Invisible 9 Do. Millers’ and Turners’.... 9 Do. On Selecting 12 Do. Pulpit 9 Do. Silver 7 Do. Steel 8, 9 Spectroscope 5 Spirit Lamp 48 INDEX. 107 PAGE. Tin Rings for Cells 49 Tolle’s Microscope Object Glasses... 44 Tourmaline Polariscope 53 Tourmalines Trial Sights 58 Turn-Tables 4^ Valentin’s Knife 47 Watchmakers’ Glasses 27 Watch-Glasses 49 Wenham’s Parabolic Illuminator.... 38 Wire Gauze Eye Protectors H Wooden Disk 9 Wright’s Collecting Bottles 51 Writing Diamonds 50 Zentmayer’s Microscopes and Ac- cessories 36-38 Zentmayer’s Objectives 44 Zinc Cement 50 Zoetrope ; or, Wheel of Life 24 Do. Pictures for 24 Zoophyte Trough 38, 45 PAG B. Spring Compressors 45 Do. Scissors 44 Sdv Glasses, Marine, Tourists, and Rifle Stage Forceps 38, 40 Do. Micrometer 38 Stand for Engravers’ Glasses 50 Do. for Stereoscopes 21 Stand, Tripod for Telescopes 14 Stanhope Lens 27 Steel Forceps 46 Stereoscopes 21, 22 Stereoscopic Pictures 22 Student’s Lamp 54 Sun Glasses 49 Syringe for Injecting 48 Telescopes, Astronomical 15 Do. Marine 13, 14 Test Tubes 49 Thin Glass 49 Three-Legged Microscopes 26 JAMES W. QUEEN & CO. Mathematical, Optical & Philosophical INSTRUMENT MAKERS AND IMPORTERS, No. 924 Chestnut Street, Philadelphia, and No. 535 Broadway, New York. Either of the following numbers of our Priced and Illustrated Catalogues will be furnished, on application, and sent by mail, on receipt of ten cents, to all parts of the United States, Canada, and the West Indies. Each num- ber of our Catalogue is a complete index to the department it represents. Notice.—Having expended a large amount of money for the drawing and engraving of the illustrations in this Catalogue, we have taken the precaution of protecting ourselves by a copyright, against “pirating by unprincipled dealers, and shall prosecute such to the full extent of the law, in all cases detected of copies having been made from the illustrations or reading matter thereof. PART FIRST. MATHEMATICAL INSTRUMENTS. 155 Pages. PART SECOND. OPTICAL INSTRUMENTS. 108 Pages. PART THIRD. MAGIC LANTERNS, STEREOSCOPTICONS, AND DISSOLVING VIEW APPARATUS. 88 Pages. PART FOURTH. METEOROLOGICAL AND PHILOSOPHICAL INSTRUMENTS AND SCHOOL APPARATUS. 62 Pages. ROLLER’S TYPE PLATES, Nos. I and 2. MOLLER’S TEST PLATE OF DIATOMAGE^E. NOBERT’S BANDS OF TEST LINES, From 10,000 to 100,000 to the inch. Each number of our Catalogue is furnished on application, and will be sent by mail for ten cents, to all parts of the United States, Canada, and the West Indies. TWENTY-SIXTH EDITION.—PART SECOND.