Biennial Report, Volumen5

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State of California Department of Public Health., 1879
1892/1894-1894/1896 include also, The Transactions of the second and fourth annual sanitary conventions held at San José, April 16, 1894 and Los Angeles, April 20, 1896.
 

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Página 49 - It will be safe to infer, however, from the above results, that there is no river in the United Kingdom long enough to effect the destruction of sewage by oxidation.
Página 104 - ... they shall gather such information in respect to these matters as they may deem proper for diffusion among the people.
Página 49 - Abingdon and Windsor still pass their sewage into the river, although they have commenced sewage works which will in time more or less remedy the evil. It was long thought that sewage was destroyed by running water, but now it is believed by chemists to be all but indestructible there, and to be rendered insensible, as already said, and inert, only by being mixed largely, — thoroughly diluted, in other words, with at least one hundred times its volume of good water.
Página 49 - ... per cent of sewage, we are led, in each case, to the inevitable conclusion that the oxidation of the organic matter in sewage proceeds with extreme slowness, even when the sewage is mixed with a large volume of unpolluted water...
Página 56 - ... •05 parts per million, the water belongs to the class of very pure water. When the albuminoid ammonia amounts to •05, then the proportion of free ammonia becomes an element in the calculation ; and I should be inclined to regard with some suspicion a water yielding a considerable quantity of free ammonia, along with more than •05 parts of albuminoid ammonia per million.
Página 57 - I should be inclined to regard with some suspicion a water " yielding a considerable quantity of free ammonia along with more than '05 parts of " albuminoid ammonia per million. Free ammonia, however, being absent, or very small, " a water should not be condemned unless the albuminoid ammonia reaches something " like
Página 73 - Medical opinion in Massachusetts, as deduced from the written statements of resident physicians in 183 towns, tends strongly to prove, though perhaps not affording perfect proof of , the existence of a law in the development of consumption in Massachusetts, which law has for its central idea, that dampness of the soil of any township or locality is intimately connected, and probably as cause and effect, with the prevalence of consumption in that township or locality.
Página 68 - ... enables that soil to exert the most powerful chemical influence upon all organic compounds, so great indeed as to be capable of purifying the crudest sewage. The effect of drainage upon the soil is to promote porosity, and the effect of porosity is to make the soil dryer, warmer, and less capable of conveying extremes of temperature. It is also well known that a soil perfectly saturated with water, which can only part with its water by evaporation, is rendered cold and unwholesome as a site for...
Página 61 - ... starting from a point one foot below the surface of the water and about two feet below the capstone, passes out near the surface of the ground and is continued by a cemented vitrified pipe to a point about twenty-five feet farther away. Here it connects with a system of openjointed drain tiles, consisting of one main fifty feet long, and eight lateral drains six feet apart and each about twenty feet long. These drains underVOL. XXXVI. N0.216. 28 lie a part of the lawn and are only about ten inches...
Página 61 - NO. 216. 28 lie a part of the lawn and are only about ten inches below the surface. During the whole growing season their course is very distinctly marked by the rank growth of grass over and near to them, the difference of growth in their immediate vicinity being so great that were the work to be done over again I should place the lines but three feet apart.

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