Outlines of rural hygiene. For physicians, students, and sanitarians / by Harvey B. Bashore. With an appendix on the normal distribution of chlorine by Herbert E. Smith. Illustrated.

  • Bashore, Harvey B.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of rural hygiene. For physicians, students, and sanitarians / by Harvey B. Bashore. With an appendix on the normal distribution of chlorine by Herbert E. Smith. Illustrated. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    qualities. The same property which makes a gravel-bed good for building purposes—i.e., because drainage is good and a dry foundation is obtainable—makes it very bad for wells, for it is so porous that there can hardly be any hope of its yielding an uncontaminated water, if there is any means of contamination within a reasonable distance. Such are some of the considerations which arise when one is in search of a good well-water; but, irrespective of any of these and without care or study, wells have been dug everywhere, and consequently are almost everywhere polluted. The question is at once asked: Can anything be done with these old wells whereby they may be rendered safe as a source of drinking-water? If possible, it would be best to completely eliminate them and obtain some other supply. When this is not feasible, the well, if not too grossly polluted, may be rendered more or less safe by a method devised by Dr. Koch. Koch’s Method.—Suppose that we have one of these wells which yields a polluted water. To begin with, Ave take out the pump, if there is one, and pour in sand until it reaches within a foot or two of the lowest water-level; the lowest level of the ground-water generally occurs at the end of a dry, hot summer, and for this reason such a time should be selected for the application of this method. We noAv place in the centre of the well an iron tube three or four inches in diameter, with its loAver end expanded and perforated. This end of the tube rests on the sand and, while it is held in place, a bushel or tAvo of fine gravel is