1 10ME Sanitation A Manual FOR House-keepers HOME SANITATION A MANUAL FOR HOUSEKEEPERS BY THE SANITARY SCIENCE CLUB OF THE ASSOCIATION mirnrn OF COLLEGIATE ALUMNA. BOSTON TICKNOR AND COMPANY 1887 Copyright, 1887 By T1CKNOR AND COMPANY All rights reserved PRESS OF ROCKWELL AND CHURCHILL BOSTON PREFACE. r I "'HE Sanitary Science Club of the Association of Col- legiate Alumnae was organized in November, 1883, for the study of home sanitation. Two years were de- voted to general study and research before any attempt was made to extend the work beyond the limits of the club. Since that time the material now presented has gradually taken form. The questions have been practically tested by the members of the club in their own homes and by other housekeepers. The questions have also been adopted as the basis of a course in sanitary science offered by the Society to Encourage Studies at Home. The practical sanitary work accomplished by the club, both for them- selves and for others, cannot be mentioned in detail. But as an encouragement to the formation of similar clubs, and to the study of the subject, it may be said that the expenditure of time and effort has been amply repaid by positive and satisfactory results. Since its organization the membership of the club has 4 PREFACE. undergone several changes. The present active members desire to express their indebtedness to their former associates for much of the preliminary work, without which this little book could not have been made. Annie E. Allen, Alice Stone Blackwell, Sarah Louise Day, Alla W. Foster, Edith Talbot Jackson, Alice Peloubet Norton, Ellen H. Richards, Marion Talbot. Editors, Boston, June i, 1887. CONTENTS. CHAPTER I. PAGE Introductory .......... 7 CHAPTER II. Situation of the House and Care of the Cellar ... 10 Questions 12 CHAPTER III. Drainage and Plumbing ........ 15 Questions ........... 19 CHAPTER IV. Ventilation .......... 31 Questions . • 33 CHAPTER V. Heating 37 Questions ........... 42 CHAPTER VI. Lighting 46 Questions 50 6 CONTENTS. CHAPTER VII. PAGE Furnishing 52 Questions 54 CHAPTER VIII. Clothing 58 CHAPTER IX. Food and Drink ......... 63 Questions . 65 CHAPTER X. Sanitary Work for Women ....... 68 List of Books of Reference ...... 73 Index 77 HOME SANITATION. CHAPTER I. INTRODUCTORY. THE hygiene of the home is a subject of growing im- portance and interest. As one of the problems of social and economic science it is beginning to receive the attention it mav rightly claim. The women of our country should not only follow the discussions which are carried on by sanitary congresses, boards of health, and other authorities, but, by combining theory with practice, as few others can, aid in solving the great questions which seriously affect the interests of the home and the family. The object of this manual is to arouse the interest of housekeepers in the sanitary conditions of their homes. The questions are so framed that an affirmative answer implies a satisfactory arrangement, and also suggest a remedy if the answer is negative. In thus pointing out the sources of danger, and the ideal standards of sanitation in the perfectly healthful house, the compilers do not intend unnecessarily to alarm or discourage the householder. It is their aim to urge the intelligent over- sight of these matters, and to indicate the points requiring investigation, the methods of examination, and the practical remedies. 8 HOME SANITATION. The conditions required under the two topics (Situation and Drainage) which open the subject may seem as difficult of realization, especially to those already settled in their homes, as they are important. But while the suggestions would be of greater value to those considering the choice of a residence, yet it is believed that they will show those who assume that the conditions of their houses are beyond their control, that the remedy frequently lies within their reach. The second topic (Drainage) is necessarily somewhat technical; but it is hoped that the explanations in the notes will prove that the difficulties are more apparent than real, and that the principles can be easily under- stood. It is unavoidable that some of the points, in a subject so full of detail, should appear in themselves trivial, and the risk to health, incurred in ignoring them, very slight; but the sum of such trifles often makes the difference be- tween physical vigor and weakness, and the risk, small as it is, is greater and more serious than that from fire, against which the householder always insures himself. One of the most dangerous qualities of the unsanitary house is that it does not always and at once pi'oduce a definite and virulent disease, such as typhoid fever or diphtheria, though such is often its result; but, without doubt, it slowly and insidiously causes ill-health and general languor, which incapacitate for sustained effort, and to which women are especially subject from their greater confinement to the house. In conclusion, the householder must be i*eminded that it is not enough to secure right sanitary conditions ; they must be maintained. This can best be done through the eternal vigilance of the housekeeper, who can thus, in large measure. INTRODUCTION. 9 secure the two essentials of a happy home, — good health, and its attendant, good-nature. The following motto should be the basis of her efforts : — “ Any invention intended to be a substitute for watchful- ness will prove a delusion and a snare.” 10 HOME SANITATION. CHAPTER II. SITUATION OF THE HOUSE AND CARE OF THE CELLAR. THE location and surroundings of the house are of the first importance from a sanitary stand-point. Folding- doors and carved mantel-pieces are attractive to the house- hunter ; but the satisfaction they give may be more than offset by the bad effects of a neighboring marsh, a wet cellar, or a lack of sunshine. As W. P. Gerhard well says: “It must be constantly borne in mind that, while defective construction may generally be remedied, unhealthy sur- roundings, an undesirable aspect, or insalubrious building site cannot be changed.” The chief essentials to be secured are pure air, sunlight, and dryness. These are conditions upon which physical and mental vigor largely depend. Without them the human system loses its power of resistance to disease. Rheumatism and consumption are diseases which are peculiarly pi'evalent under such conditions. Moreover, many forms of organic life, which are particularly injuri- ous to human beings, and are known familiarly to us in the form of decay and mold, thrive only in dampness and darkness. It is fortunate that some, at least, of the many sources of contamination are offensive to the sight and smell, and we instinctively keep as far from them as possible. But there are other unsanitary agents of a more insidious char- acter, whose importance is often overlooked or ignored. SITUATION OF HOUSE — CARE OF CELLAR. 11 Among these is the air which circulates in the ground. We usually think of the air as above the ground, not as moving about in it, and seldom realize how great this amount is, until we try the simple experiment of pouring water into a potful of dry earth and notice how much the earth will absorb in the space which was before occupied by air. The ground-air is more dangerous than the free atmos- phere because it is more apt to be tbe carrier of foul gases and an undue amount of moisture. It will, therefore, be observed that a large number of the following questions are planned with a view to keeping dampness and ground-air out of the cellar. The reader may exclaim, “Why, you would be more par- ticular about the cellar than the parlor; ” and she would not be far from right. The day has not passed when a contem- plated visit to a cellar is, in many cases, a cause of some trepi- dation and alarm. There are the breakneck stairs to grope down, and some calculation is needed to land in safety on the board floating about at the bottom. A few steps farther and the intruder may knock her head against a hanging shelf, covered with an accumulation of fragments of foods. She decides that a little fresh air would be de- sirable. She makes her way towai*d one of the narrow windows through whose covering of cobwebs and dust a few rays of light straggle. But the first attempt to open a window is a failure, for the coal-bin forms an impassable barrier ; and the second is no less futile, because of the row of old barrels, filled with decaying vegetables and house- hold rubbish, which are posted against the cellar-wall. The only other inlet for fresh air is the cellar-door, which is too heavy to lift, and the visitor is forced to retreat without fulfilling her good resolve. 12 HOME SANITATION. As the reverse of this picture, we may refer to the cellar which is not only sanitarily ideal but practically possible. It is as light and dry and clean as any room in the house. The windows are large, are on different sides, and can be opened easily. The walls are free from dust and cobwebs, and look quite attractive in their coat of whitewash. The sweetness and purity of the air are not only a satisfaction to the good housekeeper when she inspects her cellar, but they have much to do with the well-being of the family. Much of the air which enters the different rooms of the house comes from the cellar. A heated house acts like a chimney. Not only does it draw air from the ground about it, unless the cellar walls and floor are impervious, but the movement of air is from the bottom upwards, and the air of the cellar makes its way into every part of the house. A German experimenter proved that one half of the cellar-air made its way into the first story, one third into the second, and one fifth into the third. The upward movement of air is shown frequently by ceilings. The dark streaks are formed by the deposit of dust from the air which passes through the plastering between the laths. These facts prove the necessity of especially considering the cellar in its function of a reservoir of air for the whole house ; and it will be readily agreed that there is little use in adopting special methods of ventilation for the living- rooms and sleeping-rooms if foul air is allowed constantly to rise from the cellar. QUESTIONS. I. When you selected your house did you make sure that it was in a healthful locality as well as in a convenient and fashionable one? SITUATION OF HOUSE — CARE OF CELLAR. 13 2. If the house is situated on rising ground, is the surface- water (from rains) carried away on all sides by either natural or artificial drains? 3. If the ground is level are there under-drains carrying away the rain-water? 4. Is the soil sandy and porous? 5. If the soil is clayey and compact is there special pro- vision for drainage? 6. Is there a distance of at least 200 feet between the house and any low marshy spot, any opening of a sink- drain, or other drain, or any deposit of decaying material? 7. Is there at least a quarter of a mile between the house and any source of contamination of the air the occupants must breathe such as marsh at low-tide, boggy pond or lake, low river-bank, pools of standing water? 8. Are the first-floor-beams of the house laid upon stone or brick foundations, three to six feet above the ground ? Note. — Only about half the height of the cellar is then below the surface of the ground. 9. Is there a cellar or ventilated air-space under the whole house ? 10. Is there a separate cellar (either under a carriage- house or other building, or walled oft' from the main cellar and with a separate entrance), in which all vegetables and other perishable articles are stored ? 11. Is the cellar perfectly dry at all seasons of the year ? 12. If not, are special drains laid under the cellar-floor? 13. Is the floor cemented ? 14. Are the sides cemented? 15. Is the cellar thoroughly cleaned and whitewashed with lime every spring? 16. Has the cellar several windows so that it is light and well aired ? 14 HOME SANITATION. 17- Are these windows accessible? 18. Is it lathed and plastered overhead? 19. Is the coal-cellar a light and dry place? Note. — The decomposition of the sulphides in the coal goes on much more rapidly in a damp atmosphere. Sul- phides cause silver to tarnish. 20. Do the living-rooms and sleeping-rooms have the sunshine a good part of the day ? 21. Are shade-trees removed which would surround the house too closely and prevent the entrance of sunlight and the circulation of fresh air? 22. Are all the sleeping-rooms above the first floor? 23. Are there windows on two sides of every room, or suite of rooms, or some other efficient means of producing a strong current of air when needed ? Chiefly applicable to a city house : — 24. Is the street pavement usually clean and dry? 25. Are the gutters clean, and does the water run freely from them to the drain ? 26. If the lot is on made land — (a) Have you consulted old topographical maps, in order to learn the original character of the soil, and direc- tion of the water-courses? (b) Does the soil consist of gravel, sand, or loam, not a mixture of ashes, street-sweepings, and house-refuse? (c) Was the site well drained before the process of filling-in was begun? (d) Have some years passed since the lot was filled in ? 27. Is the back-yard provided with a drain for rain water ? DRAINAGE AND PLUMBING. 15 CHAPTER III. IT may be confessed, frankly, at the outset, that drainage and plumbing present some of the most intricate prob- lems with which the housekeeper has to deal; but, for the encouragement of the reader, it may be said that they are like most tangled skeins, — after the first few knots are care- fully disentangled the rest of the difficulties vanish almost of themselves. Moreover, there is a special inducement to make a little extra effort; for from defects in this department by far the greater part of the most serious and immediate dangers to life and health in the household arise. In many instances these can be averted, without expense or even tech- nical skill, by intelligent oversight and a knowledge of what defects to look for, how’ to find them, and how to remedy them. When an expert is really needed a little knowledge en- ables one to recognize the fact in season to save the heavy penalty of illness or expensive repairs which delay often involves. In no department of household economy are the old adages about the ounce of prevention and the stitch in time more valuable. These questions aim to save the pound of cure, and avert the nine stitches. They do not aim to supplant the mechanic or engineer, or to supply the place of a scientific treatise. They are based upon the principles stated by Rogers Field as the three canons of house-drainage : — DRAINAGE AND PLUMBING. 16 HOME SANITATION. 1. All refuse matters must be completely and rapidly re- moved. 2. No passage of air can be allowed to take place from drain or waste-pipes into houses. 3. No communication can be permitted to occur between the drains and the water-supply. In two ways these questions are designed to be especially helpful. First. To enable those selecting a house to judge of its sanitary condition. It cannot be too strongly urged in this connection that every inch of pipe, every cesspool, every drain and joint and trap, must be seen and tested. If they are so imbedded in wood-work, walls, floors, or ground, as to make this impossible, that fact is, in itself, condemnation enough. Such concealment makes two evils certain, even if everything else is all right at the time. (1.) Because of the trouble or even practical impossibility attending inspection, there will not be the thorough and periodical examina- tion of the whole drainage system which safety requires just as much as in the case of the steam-boiler. (2.) A leakage or break is liable not to be discovered until it has produced seriqus or possibly fatal disease ; and then there is often delay, and, eventually, the partial demolition of floors and walls in order to get at the root of the trouble. Second. To aid those in charge of a household to main- tain healthful conditions. The larger the staff of servants, and the more complicated the drainage system, the more necessary is intelligent supervision. When the mistress has little realization of the importance of sanitary precautions it is scarcely to be expected that even the most trusty ser- vants will display greater interest, foresight, and intelligence in the daily care of the house. It is difficult to say whether DRAINAGE AND PLUMBING. it is more necessary to start right in the beginning with simple and efficient drainage, or to keep it in good condition by watchful, constant attention. The importance of apparent trifles must be felt, and careful regard paid to them. The single match or banana-peel in the closet, the lock of hair in the washbowl, maybe the soui'ce of serious and expensive trouble. It will aid in the most intelligent use of the questions if some simple descriptive manual be read in connection with them to serve for further explanation and illustration. The question of the disposal of sewage outside the imme- diate premises is beyond the control of the individual, and, therefore, not within the scope of this book. The disposal of sewage where there is no water-carriage system has been touched upon by a few leading questions ; but any elabora- tion of the practical application of the methods suggested should be sought in some treatise devoted to the subject. In conclusion, we may quote from Mr. J. Pickering Put- nam a few general principles of universal application which might be called The Ten Rules of Sanitary Drainage : — 1. Simplicity. 2. Accessibility. 3. Thorough flushing. 4. Ventilation. 5. Noiselessness. 6. Soundness of material. 7- Tightness of joints. 8. Avoidance of mechani- cal contrivances. 9. Economy of water. 10. Automatic ooeration. DRAINAGE AND PLUMBING. 19 QUESTIONS. 1. Have you a plan of the system of pipes in your house ? (See W. P. Gerhard’s diagram on preceding page.) 2. Is all the plumbing-work exposed to view, or easily accessible ? 3. Are the fixtures on the different floors placed over each other so as to avoid horizontal soil and waste pipes? Note I. Fixtures include water-closets, washbowls, tubs, sinks, etc. Note II. — The soil-pipe conveys the contents of water- closets and urinals to the house-drain. It may also receive the contents of waste-pipes. The waste-pipes carry other refuse fluids, as of tubs, sinks, washbowls, etc., only. These pipes may discharge either directly into the house- drain, or into the soil-pipe. The house-drain is the pipe which receives the contents of the soil and waste pipes, and conveys them outside the house. It is nearly horizontal, with an inclination of at least one in fifty, while the soil and waste pipes should be vertical. 4. Are all the pipes air-tight as shown by the peppermint test ? Note. — Pour two ounces of oil of peppermint into the soil-pipe at its mouth above the roof, if it is accessible, or into the basin or water-closet nearest the roof, first closing the vent-pipes which appear above the roof. Pour in, immediately after, a pailful of hot water ; if the odor of pep- permint is perceived, at any lower fixture, it is an indication that there is an opening in some pipe through which foul air may escape. The peppermint should be kept outside the house until needed, and the person who pours it in should remain on the roof, or in the room with closed 20 HOME SANITATION. doors, until the examination of the fixtures below has been made by an assistant; otherwise, the odor will come from the bottle, or the clothing of the person, and spoil the test. Oil of peppermint is sold for the purpose in 2-ounce vials, hermetically sealed. 5. Is the continuation of the house-drain outside the house to the sewer or cesspool properly laid, i.e. — (#) Are the pipes of small size, not more than five inches in diameter, in order that they may be thoroughly scoured by the rush of water? (b) Are they laid with a continuous grade of at least one in fifty ? (c) Have they tight joints ? 6. If this outside di*ain is in made ground, or quicksand, or near trees, or a well used for drinking, is it made of iron? If otherwise, if not of iron, is it of earthenware, with cemented joints? 7. Is there a trap on the house-drain, near the cellar wall, to prevent the entrance of foul air from the sewer? (a) Has this trap a cleaning-hole so that it can be reached and cleaned? (£) Is care taken to close the cover of this cleaning-hole pei'fectly air-tight after each examination? Note. —A trap is a bend in a pipe, with or without an enlargement, which retains a sufficient quantity of the water that passes through it, to prevent the passage of foul air hack through the pipe, and into the room. There are many kinds of traps. The S trap, Fig. 136, and the bottle- trap, Fig. 139, are in common use. The water standing in the trap is called the seal. It is effective when it stands at least one inch above the bend in DRAINAGE AND PLUMBING. 21 the pipe. If it stands lower space is left above the water for the passage of foul air back through the pipe, and the seal is “broken,” as in Fig. 137* Fig. 136. A trap, to be effective, must be of such a size and shape that it will be self-cleansing. If the water-seal is too deep, solid matter will not all be carried out of the trap. 8. Is there a pipe for the admission of out-door air on the house side of this trap? (Question 7.) Note. — Air admitted here will pass up through the house-drain and main soil-pipe, diluting and carrying off at the roof the foul air in these pipes. (a) Is the opening of this pipe at least ten feet from a window, door, or the cold-air supply of any heating appa- ratus, lest a counter-current should carry the foul air back through the fresh-air pipe? (<5) Is the fresh-air inlet at least as large as the drain, four inches in diameter? (c) Is its opening protected from obstructions? 9. Is the house-drain carried in full sight along the face of the cellar-wall, or suspended from the cellar-ceiling? Fig. 139. Fig. i37o 22 HOME SANITATION. Note. — If there are fixtures necessitating the laying of the pipe at a lower level than the cellar, the drain should be laid in a mason-work trench (or on special foundations, in filled-in land), under the cellar-floor, with movable covers, that leakage in the joints of this important pipe may be surely and quickly detected. 10. Is the drain protected from the settling of the cellar- valls by an opening, arched or crossed with a long stone, vhere it passes through them? 11. Is the soil-pipe — (a) As small as four inches in diameter? (<5) Carried in a straight line at least two feet above the roof for ventilation, with its opening away from windows, chimney-flues, and fresh-air ventilators? (c) Protected at its opening by a wire-screen from the entrance of leaves and other obstructions ? («T) Made of cast-iron with calked lead joints, and coated inside and outside with asphalt or some equivalent sub- stance ? 12. Do the branch waste-pipes connect by a Y branch and bend with the soil-pipe? Note. —AY branch is so named from its shape. 13. Has each water-closet, washbowl, bath-tub, sink, set of laundry tubs, etc., a separate trap, and one only? Note. — If a fixture has two traps, or if there are two traps on the same length of pipe, the air between them may be so compressed that it will force its way through the trap having the shallower water-seal. This is the cause of the irregular gurgling sound sometimes heard. It may be remedied by removing one trap, or by connecting the crown of one of the traps with a ventilating-pipe, as is now usually done with all traps. DRAINAGE AND PLUMBING. 23 14- Are the fixtures as free from wood-work in the form of casings, etc., as possible? (a) If not, can the wood-work concealing them be easily removed, and is it frequently removed for the examination and cleaning of the fixtures? 15. Does each water-closet have a sufficient supply of water, discharged with enough force wffien emptied, com- pletely to scour the traps and branch waste-pipes, i.e., two or three gallons to each closet at each flushing ? 16. Ai'e all objects excluded from the water-closet which are likely to obstruct the pipes, such as hair, strings, rags, china, glass, or anything not quickly and easily dissolved? 17. Are the water-closets flushed with water from a special cistern used for that purpose alone, and never as a supply for drinking or cooking, or for the hot- water system ? 18. When a fixture is not to be used for some time is the evaporation of water in its trap, which would destroy the seal and admit foul air to the house, prevented by pouring down oil or glycerine, so as to cover the water in the trap? 19. Are all stationary lavatories excluded from sleeping apartments, unless special precautions are taken? 20. Are concealed overflow-pipes avoid- ed, and standing overflow-pipes or some substitute used ? (a) If the overflow-pipes are concealed, are they frequently flushed with clean water ? (<3) Do they connect with the waste- pipe between the bowl and its trap? 24 HOME SANITATION. 21. Is siphonage of traps guarded against by venti- lating-pipes, pot-traps, or mechanical traps? Note. — When a body of water with considerable mo- mentum is discharged into a pipe (as in emptying a pail of slops or flushing a water-closet) it drags air along with it, and partially exhausts the air in all the branch pipes. The pressure of the atmosphere outside the pipe, upon the water in the trap, will then be greater than that from inside the pipe, and the water in the trap will be forced down into the pipe, until the water-seal is broken, and space left for the passage of foul air up into the room. The vent-pipe is an air-pipe attached to the highest part of the bend in the trap, on the sewer side of the water-seal, thus affording free admission of air to the inside of the pipe, to balance the pressure of the atmosphere outside and preserve the water- seal, when the air in the branch waste- pipes has been swept away by a dis- charge of water. The opening sometimes becomes clogged, as in the cut. Vent-pipes are usually required by plumbing laws. A pot-trap is one like Fig. 139 (Question 7, note), with a chamber large enough to hold a deep water-seal which can- not be easily broken. A small pot- trap will not resist siphonage, but a large one will. These traps, how ever, retain filth, and are liable to clog. Mechanical traps ai*e those hav- ing, in addition to the water-seal, DRAINAGE AND PLUMBING. 25 some mechanical contrivance, as valve, ball, flap, etc. They are liable, from their complicated construction, to get out of order; they are not self-cleansing, and accumulate deposits. In view of these objections it is generally considered best to use vent-pipes with water-closet traps ; and bottle- traps, frequently cleaned out, under sinks, basins, and tubs. 22. If the vent-pipe is used, is it (a) either extended through to the roof and two feet above it, entirely separate from any chimney-flue, or branched into a soil-pipe above the inlet from the highest fixture ? (<5) Is it either vertical or continuously sloping, to avoid collection of water by condensation ? (c) Is the main vent-pipe at least three inches, and the branch vent-pipe two inches, in diameter? 23. Are slop-hoppers thoroughly flushed after each use? 24. Is their outlet provided with a strainer? 25. If a water-closet is used as a slop-hopper, is it in- variably a hopper or wash-out closet, without wood-work except the seat on the top? Note . — Pan, valve, and plunger closets should never be used for slops. 26. Is the o 1 d- fashioned pan-clos- et, which is con- demned as clumsy and unsafe by all sanitarians, replaced by some one of the numerous simpler and more effective modern closets? Fig. 145. 2 6 HOME SANITATION. Pan Closet. The upper bowl is set into a large container; a copper pan closes the bowl at the bottom. The dotted lines show the position of the pan when open. The contents of the bowl are discharged by tilting the pan by the lever. It is a complicated apparatus, and likely to get out of order. Its container is inaccessible. This container becomes foul, and the flush of water cleanses it very imperfectly. The flush is usually not strong enough to drive the solid matter over the bend of the S trap in the pipe. The foul air from the decomposition of this filth escapes into the room every time the closet is used and the water-seal in the pan is broken ; it also escapes through the lever-hole when not in use. Even if these objections are obviated by a special flushing apparatus for both bowl and container, by fresh- air pipe and vent-pipe, and by enamelling the container, the only merit which can be claimed for it is that of cheap- ness. The essentials of a sanitary closet are rapid and free flushing; a deep water-seal; avoidance of siphonage; simplicity of construction ; accessibility for cleansing and inspection. There are many modern fixtures which fill these conditions. 27. If a grease-trap is provided for the kitchen sink, is it frequently cleaned and inspected ? Note. — Grease carried from the kitchen sink by hot water soon becomes cold, and adheres to the sides of the pipe and trap, unless the drain has a very good pitch. A special trap Objections. DRAINAGE AND PLUMBING. 27 placed near the sink to intercept the grease before it con- geals is called a grease-trap. If there is no grease-trap the sink should be frequently washed out with a hot solution of washing-soda, potash, or copperas. 28. Is the space under the kitchen sink free to light and ventilation, and accessible for frequent cleansing? 29. Are all articles excluded from the sink-pipe which are likely.to obstruct it ? (Question 16.) 30. Is the refrigerator waste-pipe free from direct con- nection with the soil-pipe or drain ? 31. Is it discharged into an open sink in the basement, over a blind well out-doors, or is it carried by a special pipe to the street gutter. 32. If the open sink is used, is the waste-pipe from this sink effectively trapped before entering the drain? 33. Are the waste-pipes which lead from the sheet-lead safes provided under basins, tubs, water-closets, etc., to prevent flooding of floors and ceilings, not directly con- nected with the soil-pipe or drain, but discharged into an open sink in the cellar, or over water-closet cisterns? 34. Are the overflow-pipes of all cisterns used for drinking, cooking, or washing, free from direct connection with the soil-pipes? 35. Are they either discharged on the roof, or over an open sink, etc., as above? 36. Are rain-water leaders used for that purpose only, and never as soil, waste, or ventilating pipes? 37. If the leader discharges '..ito the drain is it trapped at the bottom, before entering the drain, if its top opens within ten feet of a window? Note. — When the contents of these waste-pipes (in 28 HOME SANITATION. Questions 30-37) are eventually discharged into the drain they are of great assistance in flushing the pipe. The dis- connection by trap and at the open sink reduces to a minimum the danger of back passage of foul air. When these wastes are discharged directly into the soil, they are liable to cause standing puddles, gut lawns, and increase the dampness about the house and the possibility of dampness in the cellar. 38. After sinks and bowls have been used is fresh water turned on to fill the traps and displace the dirty water which would otherwise stand in them? If the house has not the water-carriage system : — 1. Are earth-closets, ash-closets, the pail system, or some method of frequent removal and disinfection adopted? 2. If not, is the receptacle of the privy cemented to prevent leakage and soakage, and to permit the complete removal of its contents ? 3. Is the receptacle accessible from outside the house? 4. Is the closet separated from living-rooms and sleeping- rooms by a ventilated passage-way protected from storm and cold ? 5. Is a box of dried and sifted loam placed near, and enough thrown in after each use to keep the contents dry? Note. — Gravel and sand are useless for disinfection. 6. Is a separate receptacle and drain provided for slops and other fluid wastes? Note. — The efficacy of earth depends on its deodorizing and absorbing properties, which exist only when it is dry; hence, if slop-water is poured into the receptacle, a larger amount of earth is needed to absorb it, and prevent decom- position, than can be conveniently used. DRAINAGE AND PLUMBING. 29 7- Are you careful never to throw slop-water of any kind on the ground near the house? 8. Is an absolutely tight receptacle substituted for the common cesspool? Note. — The common cesspool is lined with bricks or stones so loosely laid that the noxious gases which are generated, and the liquid contents, escape into the soil. The gases are liable to make their way back into the drainage system of the house. They permeate the ground, and, if the cesspool is near the house, pollute the cellar air. The liquid contents spread through the soil, and con- taminate the water of wells and springs, even at great distances. In these different ways the cesspool may be the means of breeding and spreading disease. It is, therefore, not only a constant source of danger to the immediate household, but is always objectionable in the interest of public health. Its use is entirely prohibited by sanitarians. 9. Is this receptacle emptied (a) by a flush-tank through an impervious pipe, into a series of earthen or tile drains with open joints, and its contents discharged into the ground a short distance below the surface? Or, (b) are its contents carried through an impervious pipe, and emptied on the surface of the ground at a distance from the house or a source of water-supply ? and is the position of the outlet of the pipe occasionally changed? Note. —(Vide a.) Flush-tanks are self-emptying, tight cesspools, small in size, and made automatic in various ways. They are thus emptied intermittingly. By this action the liquid is forced more rapidly through the pipes and they are prevented from being choked. The sewage is also more widely distributed and has time to subside, instead of keeping the ground a little wet all the time ; the 30 HOME SANITATION. air can then enter, and the aerated soil can do its work as a purifying and disinfecting agent. io. If a self-emptying cesspool cannot be used, is the receptacle water-tight, suitably ventilated, and emptied at regular intervals? n. Are its contents placed on the soil in the morning of a dry clear day, and in places where they may be readily absorbed by the earth, so that the odors may be as inoffensive as possible, and is copperas solution occasionally sprinkled over them ? 12. If the house is in a village lot, which is too small to permit of any of the preceding arrangements, is a small water-tight receptacle provided and its contents regularly removed to a farm or the open country away from houses? 13. Is the kitchen sink furnished with a tight drain which will carry the drainage away from the house, instead of depositing it under the windows to decompose and act as an important factor in the production of disease? 14. Is the end of the drain next the house connected with the kitchen sink by a lead pipe with a trap? 15. Is the kitchen fire often made use of and considered an effective and economical way of disposing of articles which might otherwise be offensive? VENTILATION. 31 CHAPTER IV. VENTILATION. THE necessity of pure air in our homes cannot be too strongly urged ; and its importance should secure for it the careful daily attention of every housekeeper. She will find it difficult, at best, to keep off illness from her family ; but much may be done by a wholesome atmosphere toward keeping each member of the household strong, active, and happy. Sanitarians agree that pure air is the first essential for a healthful home. The maintenance of pure air in our climate undoubtedly entails expense, for a great deal of fuel is needed to prepare outside air for our use; but, in estimating the actual cost, several points should be considered. Not only must the bills for coal and wood be compared with the bills for doc- tors and nurses, but account must be taken of the increase in headache, listlessness, laziness, irritability, and nervous- ness, which follow as a consequence of breathing impure air. These results, which incapacitate for the duties as well as the pleasures of life, are a less striking accompaniment of impure air than are diphtheria or typhoid fever, and their cause is, therefore, too frequently overlooked. The housekeeper should personally attend to the daily airing of every part of the house, and to the warming of all living-rooms as quickly as possible afterwards. But she should remember that, if the outside air chance to be very damp or foul, no good end will be served by opening doors 32 HOME SANITATION. and windows. She should make it her duty to guard against all draughts, and should look upon them as an indication of imperfect ventilation. She should remember that windows are made for the admission of light and for an occasional thorough change of air, but are not ventilators, and that all window-ventilators, and they are numberless, are make- shifts. The ideal house is provided with an abundance of air by means of flues, without using the windows ; but, in the ordi- nary house of the present time, the use of the windows has to be depended upon more or less for a quick change of air. More air than would seem possible is admitted through the walls of the house and around the windows and doors. This amount is increased by the presence of an open fire, which draws the air toward it. A constant circulation is thus kept up, and the escape of air by the chimney keeps the atmosphere in a purer and more wholesome state than is possible with any other arrangement. An open chimney, even without a fire, carries off quite an amount of impure air. This may be greatly increased, when a fire is not needed, by placing a lighted lamp or candle in the fireplace to make a draught upwards. It must be remembered that the cardinal principle of ven- tilation is circulation. It is even more important to provide a chance for foul air to escape than to furnish a special inlet for fresh air. Under the conditions of ordinary living, air which is made impure by breathing and the burning of lamps is generally warmer than outside air and has, therefore, a tendency to rise. If it can escape, its place will be filled by air drawn in from the cracks about windows and doors. The general outlet of air for the house should be in the top story, but sometimes the open window or skylight is im- VENTILATION. 33 practicable on account of the down draugnt caused by the prevailing winds. Unless the position of the opening can be altered the plan has to be abandoned in windy weather. The height of rooms should not be over ten or at most twelve feet, unless unusual means are provided for the escape of the vitiated air, wdiich accumulates like an in- verted lake, near the ceiling. Special attention should be given to ventilating, as well as frequently airing, the kitchen and the bath-room. The odors of cooking are often so perceptible as to be a serious annoyance to the family, while they should be rarely noticed through the house and should never be troublesome. In the bath-room bad air is as dangerous as any other poison, and should be guarded against with equal vigilance. To sum up, the important objects of ventilation are : — I. To provide an abundance of pure air in every part of the house. II. To avoid draughts, either warm or cold. III. To provide means of escape for foul air and odors. Time and money spent in attaining these ends will be well invested, and the householder will be richly repaid by the increase in vigor, comfort, and happiness of every member of his family. QUESTIONS. 1. Are all living-rooms and sleeping-rooms thoroughly aired at least once a day? 2. Are the windows so placed as to make a draught pos- sible when needed to effect a quick change of air? 3. After the rooms are aired early in the morning, are they, in cold weather, at once warmed again enough for HOME SANITATION. 34 comfort and safety and to prevent remonstrances from the family against the daily airing? 4. Is there a constant supply of fresh air in every part of the house? 5. Is an outlet for foul air, as well as an inlet for fresh air, provided in the different rooms? 6. Are the inlets and outlets arranged to prevent constant draughts ? 7. Is there a skylight at the top of the house, so placed with regard to the prevailing winds that it maybe kept open a few inches most of the time as an outlet for impure air without causing a downward draught through the house? 8. If such a skylight is impracticable, can a window in the top story be kept open a little most of the time? 9. Are the outside or double windows made with two sashes, or with movable panes, so as to admit a current of air when desired? 10. Are all windows arranged so that they can be lowered easily from the top ? 11. If there is a water-tank, is the air of the room in which it is placed kept fresh and pure ? 12. Are the halls supplied with plenty of pure, warm air? 13. Are sleeping-rooms kept cooler than living-rooms? 14. When a sleeping-room is used as a sewing-room or sitting-room, during the day, is it thoroughly aired before bed-time? 15. Do you open your chamber-windows as soon as you are dressed? 16. Do you at the same time always open the closet door ? 17. At night is a piece of cotton cloth hung over the VENTILATION. 35 opening of the window, a board inserted, or a screen placed before the bed to break the force of the current of air? 18. When there is a great difference between the tempera- ture in-doors and out do you remember that a great deal of air finds its way in through the walls and around the win- dows, and the window should not be open as far as at other times ? 19. In warm weather do you keep the bath-room window open as much as possible, both top and bottom, to allow the air to escape out of doors instead of into other parts of the house ? 20. In cold weather is the bathroom window opened frequently, top and bottom, for a few minutes at a time? 21. Is there a thermometer in every room ? 22. Are the living-rooms kept at a temperature not ex- ceeding 70° F. ? 23. Have you an efficient method for ventilating the top of the rooms, where foul air is apt to collect? 24. If not, can you put in a foul-air outlet, in the shape of a box, between the ceiling and the floor above, extending from the chimney to the chandelier, with apertures over the latter ? 25. If a nursery, school-room, or sitting-room is occupied a large part of the day, or by many people at one time, are the windows occasionally opened for a few minutes, to change the air, at a time when the family are at their meals or occupied elsewhere ? 26. Does the member of the family who is the last to re- tire thoroughly air the room where the family have been sitting through the evening, in order that the foul air may not have a chance to make its way through the house dur- ing the night? 36 HOME SANITATION. Ventilation of the kitchen : — 27. Has the kitchen adequate arrangements for constant ventilation and occasional airing? 28. Is there a ventilating-flue in the kitchen-chimney? 29. If odors from cooking are especially troublesome, can a hood over the range or stove be connected with the flue, or are kettles used which have special provision for carrying away the odors ? 30. Are there windows on opposite sides of the kitchen for quickly changing the air? 31. Are there openings on different outside walls with register-ventilators which may be closed in very cold weather ? Note. — These should be so placed that no draught will be felt in the part of the kitchen most in use and should be as near the ceiling as possible, in order to move the upper strata of hot air, which usually carry odors over the whole house. HEATING. 37 CHAPTER V. IT must be the aim of the housekeeper to provide all parts of the house with air that is not only fresh and pure, but sufficiently warm for health and comfort. In this climate the question of heating the air is an important one during the greater part of the year. The different parts of the house should be of so nearly the same temperature that a chill is not felt on passing from one room to another. If the halls are kept moderately warm there will rarely be any trouble of the kind. This end is best gained when the heating apparatus is placed in the central part of the cellar and the heat is distributed to the different rooms of the house by pipes. When the house is heated by a furnace, or by steam or hot-water pipes passing through an air-chamber in the cel- lar, the hot-air conductors serve also as ventilating flues. If the rooms are heated by stoves, or by radiators, some other means must be devised to bring in fresh air. It is sometimes introduced in the floor around the stove so that it is warmed before passing into the room. The furnace is best adapted for houses of moderate size, and, if open fires are used in connection with it, there is also the best possible provision for the removal of impure air. The old-fashioned fireplaces, which our grandfathers used, were very large, and required an immense amount of fuel. When the fire was lighted it caused a tremendous draught, HEATING. 33 HOME SANITATION. and air was drawn in through the cracks around the loose windows and from the cold halls. As a result the only warm place in the room was close to the fireplace, and this was often too hot for comfort. The modern fireplace and chimney are much smaller, and serve to remove the impure air without causing sensible draughts. No part of the household machinery requires more intel- ligent or judicious management than the furnace, and it should never be left wholly to the care of servants. As its essential parts are usually completely hidden from view, the accompanying cuts are given to aid the housekeeper in understanding its construction. A furnace is practically a large stove standing in an en- closed air-chamber. The enclosing surface may be galvan- ized iron, as in a poi'table furnace, or brick. The cold-air box is the passage which connects this chamber with the out-of-door air, and the hot-air pipes distribute the air after it has been heated. These should be so planned in refer- ence to each other that the air from the cold-air box has to pass at least once around the furnace, before entering the hot-air pipes. In order to meet the too-prevalent demand for compact- ness and cheapness, many furnaces are made on the princi- ple of furnishing a small volume of air highly heated. The air as it enters the room is then in a state which is called “ burnt.” Sanitary requirements strictly forbid this. The cold-air box, the fire-pot, the hot-air chamber, the pipes and the registers should all be large enough to supply the rooms with a large volume of air moderately warmed, not over 120° F. Only then does the furnace meet the demands of both sanitary heating and ventilation. The material of which the furnace is made is of less im- HEATING. 39 40 HOME SANITATION. portance than the thoroughness of its construction. In cast- iron furnaces the few joints necessary should be horizontal.! The old notion that cast-iron allowed carbonic oxide to pass through probably arose from the fact that cast-iron furnaces and stoves have many joints which it is difficult to keep tight; but stoves with loose covers and cracks have been used in kitchens for years with apparent safety. A moment’s consideration of the conditions will show that there is little danger from this cause if the draughts of the furnace are properly arranged. If all the dampers of the kitchen stove are suddenly shut the gas comes into the room, but not otherwise. So, in a furnace, if the draught is up chimney, as it should be, there is little danger of contaminating the air. As the tendency of warm air is always to rise, it will be found difficult to heat rooms on the first floor, if the pipes leading to them, which are necessarily nearly horizontal, are more than fifteen feet long. Air at 70° is capable of containing much more moisture than it can at a lower temperature. A dish of water placed where it will slowly evaporate supplies this need, and prevents the air from seeming parched and dry. Unless the amount of fire in the furnace can be regulated easily the family are apt to suffer when warm spring days come, and the fire is allowed to go out. There should be provision for open fires, or a low fire should be kept con- stantly in the furnace, until settled warm weather. The amount of heat can be most easily regulated when the house is heated by hot water, and, with this method, there is no danger of over-heating or burning the air. HEATING. 41 42 HOME SANITATION. QUESTIONS. I. — If furnace heat is used, — 1. Is the furnace large enough to heat the house thor- oughly and at the same time furnish air for ventilation ? 2. Are all the joints tight and the castings smooth and sound ? 3. Are the furnace and pipes periodically examined and cleaned ? 4. Is the smoke-pipe at least 16 inches from the ceiling? 5. Is the smoke-pipe so arranged that there is a good draught? Has it a damper? 6. Is there provision for the evaporation of water? 7. Are the hot-air pipes so arranged that they do not come within two inches of any wood-work ? 8. Is each horizontal pipe less than fifteen feet in length? 9. Have the hot-air pipes dampers in the cellar, by which the heat may be cut off from any part of the house when desired ? 10. Is the cold-air box short and direct? II. If necessarily long, is it easily cleaned, and so ar- ranged that it cannot become a receptacle for rubbish ? 12. Is it kept perfectly clean and dry? 13. Is its area equal at least to the area of all the registers less one sixth ? 14. Is it so tight that the furnace cannot draw any air from the cellar? Note.—Wooden air-boxes are not to be recommended, because they are liable to have cracks and imperfect joints. If such exist, some of the injurious effects may be removed by filling the cracks with cotton-wool. If an opening or door, such as is shown in the cut, is provided to be used in HEATING. 43 cleaning out the air-box, it should be made to close tightly, so that air may never be drawn from the cellar into the furnace. 15. Has it a movable slide by which the amount of air admitted may be regulated? 16. Are there two cold-air boxes, on different sides of the house, to avoid the annoyance of too great wind-pressure ? Note. — This is especially desirable for a country house in an exposed situation. 17. Has the outside opening of the cold-air box a wire netting to keep out falling leaves, or cats, rats, etc. ? iS. Is this opening away from every drain-ventilator, cesspool, yard-gully, ash-barrel, swill-tub, privy, or other source of contamination ? 19. In a city house, is it on the side of the house farthest from the street, to avoid the entrance of dust, etc. ? 20. If not, is cheese-cloth or bunting stretched over it to sift out the dust? 21. Is it at least two feet above the ground? 22. Does the surface around it slope away sufficiently to carry off moisture rapidly ? 23. Are the registers so placed as to collect as little dust as possible, i.e., in the wall, when practicable? 24. Are they large enough for the room they try to heat? 25. If they are in the floor, are they taken out at least once a month, and thoroughly cleaned and the pipe wiped out with a damp cloth as far down as possible ? 26. When the room is being swept, or the furnace shaken down, do you place a damp cloth over the registers? 27. Are the registers so placed with regard to the fire- place, ventilator, or window, that the pure, warmed air, on entering the room, does not at once pass out by the outlet 44 HOME SANITATION. for foul air, and thus cause a draught, and lessen the benefit from the furnace? II. —If the house is heated either wholly or in part by open fires, — 1. Do you see that an abundant supply of fresh air is fur- nished to the fuel to avoid the formation of carbonic oxide by imperfect combustion, and also to prevent the air used to replace that which passes up chimney from being drawn from other parts of the house? Note. — With coal, a blue Jlame indicates the presence of carbonic oxide, a most poisonous gas. 2. Are the draughts of the chimney strong enough to carry away all the products of combustion ? 3. Is the hearth laid on a brick arch to prevent danger from fire? III. — If stoves are used, — 1. Is there a provision for the introduction of fresh air to take the place of that drawn from the room by the stove? 2. When the fire is kindling, after putting on fresh fuel, are the draughts arranged so that no carbonic oxide or coal- gas passes into the room ? Note. — Neglect of this precaution often leads to serious or fatal consequences. 3. Do you keep an open dish of water on the stove to give the requisite moisture to the air ? IV. — If the house is heated either by steam or hot- water, — 1. Are the boilers inspected once every year, to see if they are in good condition ? 2. Are the pipes tight so that they do not leak? 3. Are the pipes in the cellar covered with asbestos or some other non-conducting material? HEATING. 45 4- If the rooms are heated by direct radiation, i.e., if radiators are placed in the rooms, are means provided for introducing plenty of fresh air, and supplying needed moist- ure to the air? 46 HOME SANITATION. CHAPTER VI. LIGHTING. UNDER the conditions of modem civilization much reading, writing, and sewing is necessarily done in the evening, and by artificial light. During the hours spent under artificial light we are in abnormal conditions,— con- ditions which at best are unsanitary and unnatural, — and all possible precautions should be taken to render them as harmless as possible. It is believed that much headache, often attributed to other causes, is in reality due to unsuit- able lighting. Although the electric light and candles of tallow, wax, or paraffine are in use, yet the choice of illu- minant is practically limited to gas and kerosene. The two chief points to be observed in connection with the artificial light are : First, To avoid undue vitiation of air of the room ; Second, To secure a strong and steady light. All combustion uses up oxygen, and produces carbonic- acid gas ; hence, with the exception of the electric light, all artificial illumination of a room is a great tax upon the air- supply and upon the means of ventilation. It has been estimated that one ordinary gas-jet will con- sume as much air as two people, and a kerosene lamp will use as much as four people. Unless the burner is of a good pattern, there may be an escape of unconsumed gas, which still further vitiates the air. All so-called whistling of the gas means an escape of unconsumed gas, and should not be allowed. LIGHTING. 47 Combustion not only furnishes the desired light, but it also yields undesired heat, and this heat is the cause of much of the headache in the evening, as well as of much injury to the eyes. If it is necessary to hold the head near the light, it is best to have some kind of shade which is not a good conductor of heat. The amount of vitiation of the air, and the amount of heat given off, are seen by the following table. The light given by each substance was equal to that given by twelve standard sperm candles, each burning at the rate of 120 grains per hour. (“ Nature,” Vol. XXX., p. 282.) Per hour. Cu. ft. of oxygen consumed. Cu. ft. of air consumed. Cu. ft. of Carbonic- acid gas produced. Cu. ft. of air vitiated. Heat pro duced, reck oned in lbs. of water raised io° F. Gas 3-3° 16.50 2.01 217.50 I95.O Sperm oil 4-75 23-75 3-33 356-75 233-5 Paraffine1 6.8i 34-05 4-50 484.05 361.9 Sperm candles.. 7-57 37-85 5-77 614.85 35i-7 Wax candles ... 8.41 42.05 5-9° 632.25 383-1 Tallow candles. 12.00 60.00 8-73 933.OO 5°5-4 Electric light... 13.8 1 From other tables kerosene is seen to be nearly the same as paraffine. Since natural illumination is nearly equal in every part of the room, it seems desirable that artificial illumination shall also extend to every part of the room, to avoid an undue strain upon the eyes, when looking up from book or work. 48 HOME SANITATION. In the use of the kerosene lamp several points ought to be noted : — 1. The lamp should be filled daily, for two reasons: ( 55 Ail-, moisture in ......... 40 Air, temperature of ....... 35> 38 Air, vitiation of, by lights ........ 47 Artificial light .......... 46 Ash-closet 28 Bath-room 35> 56 Bed-room ........... 34> 55 Boarding-house .......... 7° Boarding-school ......... 7° Burners, choice of ......... 5° Carpet 54 Ceiling, ventilation of 33> 35 Cellar n» *3 Cellar, dangers of a visit to n Cesspool 29 Cistern 66, 67 Closets, to be avoided 5^ Closets, ventilation of ....... 34 Clothing 58, 59, 6°, 61 Cold-air box 3&> 42> 43 Consumption ....•••••• 10 78 INDEX. PAGE Dampness of soil and cellar io, u Dietary 65 Diphtheria 8 Disposal of household wastes ....... 30 Drains 13, 20, 22, 30, 66 Drainage ...... .... 8, 15 Drainage, examination of 16, 69 Drainage, plan of ......... 19 Drainage, sanitary, ten rules of ...... 17 Drainage, three canons of house ...... 16 Drainage system, illustration of ...... 18 Drinking-water, contamination of ...... 66 Dust and dusting ....... 12, 53, 55 Earth-closet .......... 28 Evaporation of water in traps ....... 23 Field, Rogers, quoted . . . . . . . . 13 Filter ............ 67 Fireplace for ventilation 32 Fixtures, inspection of plumbing 16, 69 Flush-tank .......... 29 Fresh-air inlet ...... . . . ' . 32 Food 63, 64 Furnishing, sanitary 52> 53 Furnace 37> 38, 42> 43 Furnace, care of ......... 38 Furnace, illustrations of ....... 39, 41 Gas-fixtures .......... 31 Gerhard, W. P., quoted Germ theory of disease 33 Grease-trap .......... 26 Heating, essentials of 37> 38 Home, hygiene of . . . 7, 68 Home, essentials of a happy ....... g Hot-air pipes 38 House-drain g INDEX. 79 PAGE House-drainage, three canons of • , . . . . . 16 House-drainage, illustration ....... 18 Housekeeper . . . . . . . . 7, 8, 15, 68, 69 Housekeeper, motto of ....... 9 House, situation of ........ 10 House, surroundings ........ 10 House, unsanitary ......... 8 Irrigation, sub-surface ........ 29 Kerosene lamp .......... 48, 50 Kerosene lamp, explosion of ....... 49 Kitchen, furnishing of ........ 56 Kitchen sink .......... 30 Kitchen ventilation ......... 36 Lamp, kerosene .......... 48, 50 Light, vitiation of air by artificial ...... 47 Light, dangers of artificial ....... 46 Mechanical trap ......... 24 Open fires ........... 44 Over-flow pipe ......... 23, 27 Pail system .......... 28 Pan-closet ........... 25 Pan-closet, objections to ........ 26 Peppermint test ......... 19 Philanthropic work ......... 71 Plumbing 15—27, 69 Pot-trap ........... 24 Public schools .......... 71 Putnam, J. P., quoted ........ 17 Radiators ........... 54 Rain leaders 27 Refrigerators .......... 27, 57 Registers . 54 Rheumatism .......... 20 80 INDEX. PAGE Safe wastes .... 27 Sanitary conditions maintained 8 Sanitary drainage . . . . . . . # Sanitary furnishing . . . , . . . . • 53 Sanitation, importance of knowledge of . . . . 7, 68, 73 School Committee ......... Sewerage and sewage disposal 17, 29, 30 Shoes Situation of house ......... 1o Siphonage 24 Soil-pipe 22 Soil, character of 13, 14 Stoves Summer resorts ......... 69 Sunshine in rooms ......... x4 TraPs 20, 22, 23, 24 Traps, evaporation of water in 23 Traps, illustration of ......... 21 Typhoid fever Ventilation, principles of . . . . . . . . 31-33 Ventilation, objects of ........ 33 Ventilation, methods of ...... 34) 36 Ventilation of drain-pipes ....... 21 Ventilation of the kitchen 36 Vent-pipe 24, 25 Waste-pipe 19, 22, 27 Water 65, 66 Water-closet .......... 23 Water-closets, essentials of sanitary ..... 26 Well