An Introduction to Public Health - download pdf or read online

By E. W. Caryl Thomas (Auth.)

ISBN-10: 1483167844

ISBN-13: 9781483167848

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In 1938 admissions to hospitals for the general sick were about 20 per 1000 population. —Most patients admitted to hospital do not need the full services available at a hospital up to the time they are discharged ; but, needing more than they can obtain at home, in default of any other accommodation they have to be kept at the hospital. Pressure on hospital beds makes the provision of convalescent homes a measure of economy, as the patient can be freed from the hospital that much earlier, while at the same time can be detained longer than he possibly could be at the parent hospital.

May be drawn off from a deep well. ENVIRONMENTAL HYGIENE 47 T h e dissolved solids make the water hard. A surface well, being liable to pollution, is always a doubtful source, the presence of organic matter, especially if associated with an excess of nitrogen, being very suspicious. T h e deep well is usually a safe supply, though in chalk or limestone the water is liable to pollution through fissures. — Originating partly in streams and partly in springs, river water is a mixture of surface-water, subsoil water, and springwater.

T h e acids from peat make the water plumbo-solvent. In cultivated lowland districts the water is impure, containing organic matter, etc. T h e more the water is fed by springs as compared with surface drainage the better the quality. Lakes are liable to pollution by sewage and by traffic. It is desirable that the catchment area has the minimum of inhabitants, of land under cultivation, of works of any kind, and of roads and footpaths. , in transit from source to reservoir (surface washings, house, trade, and factory drainage), during storage (by surface washings or soakage or pollution in cisterns), or through faulty distribution.

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An Introduction to Public Health by E. W. Caryl Thomas (Auth.)


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