Water And Public Health. the Relative Purity of Waters From Different Sources
Water And Public Health. the Relative Purity of Waters From Different Sources
Fuertes, James H. (James Hillhouse), 1863-1932
The book Water And Public Health. the Relative Purity of Waters From Different Sources was written by author Fuertes, James H. (James Hillhouse), 1863-1932 Here you can read free online of Water And Public Health. the Relative Purity of Waters From Different Sources book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Water And Public Health. the Relative Purity of Waters From Different Sources a good or bad book?
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believe that usually the effect of sedimentation and oxidation have been largely overestimated, and that what has been attributed to these causes has more generally been due to perfect dispersion. The com- plete sedimentation of all bacteria* by gravity is an * N. Y. State Board of Health; Report of C. C. Brown on Ex- periments on Sedimentation of Bacteria in St. Louis Settling- tanks. ETIOLOGY AND PROPHYLAXIS OP TYPHOID FEVER. 29 impossibility in any finite period of time; in flowing streams, ...even when carried down by precipitants, the bacteria may soon rise, again when freed from their weighted envelope by currents in the liquid. The currents in rivers * induced by the rugosities of the bottom, differences of temperature, and other causes are sufficient to maintain in suspension or keep in motion bodies of far greater weight than these ; and under even very adverse conditions they may be transported by flowing waters to very great distances without losing their vitality. As before stated, probably the most potent factor in the apparent dis- appearance of bacteria in large reservoirs is the more perfect dispersion of the inflowing water throughout the whole mass of impounded water than could take place in many miles of flow in a stream, because the motion of water in rivers is filamentary to a certain extent.
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