Principles of Sanitary Science And the Public Health With Special Reference to
The book Principles of Sanitary Science And the Public Health With Special Reference to was written by author W T William Thompson Sedgwick Here you can read free online of Principles of Sanitary Science And the Public Health With Special Reference to book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Principles of Sanitary Science And the Public Health With Special Reference to a good or bad book?
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There is every reason to believe that in the case of wells, springs, and other sources of water supply, the same law holds. Mere pollution with uninfected sew- age, or with thoroughly purified sewage, may do little or no harm. Something more than ordinary pollution is re- quired; there must be infection in the sewage and the presence of active, virulent and specific germs of disease. The same thing is illustrated by the case next to be con- sidered. §11. — The Case of Newburyport, Mass, In Janu...ary, 1893, an outbreak of typhoid fever in the city of Newburyport, at the mouth of the Merrimac, furnished a striking and instructive demonstration of that difference which exists, and is too often forgotten, between general "pollution" and specific "infection. " The city of Newburyport had for many years derived its drinking water from large springs of an unobjectionable character, and typhoid fever had been of rare occurrence when suddenly, in January, 1893, an unusual number of cases of typhoid fever broke out almost simultaneously, and an investigation of them was made by the author.
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