The Home Medical Library Volume V Part 1

The Home Medical Library.

Volume V.

by Various.

Preface

The character and scope of this volume render it a most useful book for the home maker. The question of sanitation is one that closely affects the life of each individual, and many of its aspects are treated here in a lucid and comprehensive manner. Designed for wide distribution, these articles have been written to meet the needs of the dweller in the more densely populated communities, as well as those living in the less thickly settled portion of the country.

In large cities the water supply is a problem that is cared for by regularly const.i.tuted sanitary authorities. Pure water is a vital necessity, but the inhabitant of a city has no need to personally concern himself with the source of supply. In the country, however, the home builder must often decide the matter for himself, and it is the aim of this book to give him the needed directions for avoiding many errors and pitfalls that abound in this direction.

House construction, with its intricate problems, is also a more serious matter for the country dweller than for his city brother.

In the matter of food supply, the inhabitant of a country district is more fortunate. Fresh vegetables and dairy products are much more easily obtained, and their freshness and purity more dependable.

The article on water supply by Mr. Gerhard is authoritative, written, as it is, by a most eminent sanitarian. The publishers are to be congratulated upon the following valuable contribution to the same subject as regards the use of copper sulphate and the concise presentation of plans for mosquito extermination, while the extended work of Dr. Price and Dr. Baker's "Food Adulteration" are much to be commended. The two latter have been connected with the Department of Health of New York City, and have the advantage of experience in an organization which gives to the citizens of New York the protection to health that the wise use of science, knowledge, and money afford.

I trust that the notes I have added in the light of recent practice of the New York City Department of Health may make this material of the utmost practical value to the householder of to-day.

Through this Department of Health, New York City spent, during 1905, over $1,500,000, and for 1906 it has appropriated over $1,800,000.

This vast sum of money is used for the sole purpose of safeguarding its citizens from disease. Sanitation in its varied branches is pursued as an almost exact science, and the efforts of trained minds are constantly employed in combating disease and promoting sanitation.

The cities care for their own, but the greater number of the inhabitants of this country must rely upon their individual efforts.

Therefore, any dissemination of knowledge regarding sanitation is most worthy. This book has a useful mission. It is pregnant with helpful suggestions, and I most heartily commend its purpose and its contents.

THOMAS DARLINGTON, _President of the Board of Health_.

NEW YORK CITY.

Part I

WATER SUPPLY AND PURIFICATION

BY

WILLIAM PAUL GERHARD

CHAPTER I

=Country Sources of Water Supply=

The writer was recently engaged to plan and install a water-supply system for a country house which had been erected and completed without any provision whatever having been made for supplying the buildings and grounds with water. The house had all the usual appointments for comfort and ample modern conveniences, but these could be used only with water borrowed from a neighbor. In all parts of the country there are numerous farm buildings which are without a proper water-supply installation. These facts are mentioned to emphasize the importance of a good water supply for the country home, and to point out that water is unquestionably the most indispensable requirement for such structures.

_Adequate Water Supply Important_

But the advantages of a water supply are not limited to the dwelling house, for it is equally useful on the farm, for irrigation, and in the garden, on the golf grounds and tennis courts, in the barns and stables; it affords, besides, the best means for the much-desired fire protection. And, most important of all, an unstinted and adequate use of water promotes cleanliness and thereby furthers the cause of sanitation, in the country not less than in the city home.

The water supply for country houses has been so often discussed recently that the writer cannot hope to bring up any new points. This article should, therefore, be understood to offer simple suggestions as to how and where water can be obtained, what water is pure and fit for use, what water must be considered with suspicion, what water is dangerous to health, and how a source of supply, meeting the requirements of health, can be made available for convenient use.

Right here I wish to utter a warning against the frequent tendency of owners of country houses to play the role of amateur engineers. As a rule this leads to failure and disappointment. Much money uselessly spent can be saved if owners will, from the beginning, place the matter in experienced hands, or at least seek the advice of competent engineers, and adopt their suggestions and recommendations as a guide.

_Points to be Borne in Mind_

Many are the points to be borne in mind in the search for water.

Science teaches us that all water comes from the clouds, the atmospheric precipitation being in the form of either rain, or dew, or snow. After reaching the earth's surface, the water takes three different courses, and these are mentioned here because they serve to explain the different sources of supply and their varied character.

A part of the water runs off on the surface, forming brooks, streams, and lakes, and if it falls on roofs of houses or on prepared catchment areas, it can be collected in cisterns or tanks as rain water. Another part of the water soaks away into pervious strata of the subsoil, and const.i.tutes underground water, which becomes available for supply either in springs or in wells. A third part is either absorbed by plants or else evaporated.

In our search for a source of supply, we should always bear in mind the essential requirements of the problem. Briefly stated, these are: the wholesomeness of the water, the adequateness and steadiness of the supply, its availability under a sufficient pressure, insuring a good flow, and the legal restrictions with which many water-supply problems are surrounded.

The first essential requirement is that of _wholesomeness_. The quality of a water supply is dependent upon physical properties and upon chemical and bacteriological characteristics. Water, to be suitable for drinking, must be neither too hard nor too soft; it should not contain too many suspended impurities, nor too much foreign matter in solution. Pure water is colorless and without odor. But it must be understood that the quality cannot be decided merely by the color, appearance, taste, and odor. The chemical and bacteriological examinations, if taken together, form a much safer guide, and with these a.n.a.lyses should go hand in hand a detailed survey of the water source and its surroundings.

_Relation of Water to Health_

Any p.r.o.nounced taste in the water renders it suspicious; an offensive smell points to organic contamination; turbidity indicates presence of suspended impurities, which may be either mineral or organic. But even bright and sparkling waters having a very good taste are sometimes found to be highly polluted. Hence, it should be remembered that neither bright appearance nor lack of bad taste warrants the belief that water is free from dangerous contamination.

It is a well-established fact now that there is a relation between the character of the water supply and the health of a community; and what is true of cities, villages, and towns, is, of course, equally true of the individual country house.

_How Water Becomes Contaminated_

There are numerous ways in which water may become polluted, either at the source or during storage or finally during distribution. Rain water, falling pure from the clouds, encounters dust, soot, decaying leaves and other vegetable matters, and ordure of birds on the roofs; its quality is also affected by the roofing material, or else it is contaminated in the cisterns by leakage from drains or cesspools.

Upland waters contain generally vegetable matter, while surface water from cultivated lands becomes polluted by animal manure. River water becomes befouled by the discharge into it of the sewers from settlements and towns located on its banks. Subsoil water is liable to infiltration of solid and liquid wastes emanating from the human system, from leaky drains, sewers, or cesspools, stables, or farmyards; and even deep well water may become contaminated by reason of defects in the construction of the well.

During storage, water becomes contaminated in open reservoirs by atmospheric impurities; a growth of vegetable organisms or algae often causes trouble, bad taste, or odor; water in open house tanks and in cisterns is also liable to pollution. During distribution, water may become changed in quality, owing to the action of the water on the material of the pipes.

From what source shall good water be obtained? This is the problem which confronts many of those who decide to build in the country.

The usual sources, in their relative order of purity, are: deep springs and land or surface springs, located either above or below the house, but not too near to settlements; deep subterranean water, made available by boring or drilling a well; upland or mountain brooks from uninhabited regions; underground water in places not populated, reached by a dug or driven well; lake water; rain water; surface water from cultivated fields; pond and river water; and finally, least desirable of all, shallow well water in villages or towns. These various sources of supply will be considered farther on.

_An Ample Volume Necessary_

The second essential requirement is _ample quant.i.ty_. The supply must be one which furnishes an ample volume _at all seasons_ and for all purposes.

What is a reasonable daily domestic consumption? The answer to this question necessarily depends upon the character of the building and the habits and occupation of its inmates. It is a universal experience that as soon as water is introduced it is used more lavishly, but also more recklessly and regardless of waste. For personal use, from twenty to twenty-five gallons per person should prove to be ample per day: this comprises water for drinking and cooking, for was.h.i.+ng clothes, house and kitchen utensils, personal ablutions, and bathing; but, taking into account other requirements on the farm or of country houses, we require at least sixty gallons per capita per diem. To provide water for the horses, cows, sheep, for carriage was.h.i.+ng, for the garden, for irrigation of the lawn, for fountains, etc., and keep a suitable reserve in case of fire, the supply should be not less than 150 gallons per person per day.

_A Good Pressure Required_