The Treatment and Utilisation of Sewage

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Macmillan and Company, 1887 - 511 páginas
 

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Página 367 - The right way to dispose of town sewage is to apply it continuously to land, and it is only by such application that the pollution of rivers can be avoided.
Página 472 - Provided that this section shall not extend to compel any sanitary or other local authority to admit into their sewers any liquid which would prejudicially affect such sewers, or the disposal by sale, application to land, or otherwise, of the sewage matter conveyed along such sewers, or which would from its temperature or otherwise be injurious in a sanitary point of view...
Página 471 - Any liquid which shall exhibit by daylight a distinct colour when a stratum of it one inch deep is placed in a white porcelain or earthenware vessel. (d) " Any liquid which contains, in solution, in 100,000 parts by weight, more than two parts by weight of any metal except calcium, magnesium, potassium, and sodium.
Página 471 - Any liquid which contains, in 100,000 parts by weight, more than one part by weight of sulphur, in the condition either of sulphuretted hydrogen or of a soluble sulphuret. (h) " Any liquid possessing an acidity greater than that which is produced by adding two parts by weight of real muriatic acid to 1,000 parts by weight of distilled water.
Página 472 - Stream ," includes the sea to such extent, and tidal waters to such point, as may, after local inquiry and on sanitary grounds, be determined by the Local Government Board, by order published in the London Gazette.
Página 471 - ... in suspension more than three parts by weight of dry mineral matter, or one part by weight of dry organic matter in 100,000 parts by weight of the liquid.
Página 256 - Buchanan's final conclusion from his investigations was, that the progress made by the inhabitants of most of the twenty-five towns, in decency, cleanliness, self-respect and morality, was, at the least, as striking as the improvement in the health, measured by the mortality returns.
Página 263 - ... the excessive rainfall also prevented much ventilation of the house by open windows. Two or three days afterwards, one of the occupants of a room, the farthest in the house from the closet, fell ill with symptoms of typhoid fever, and in a few days the other person sleeping in that room also showed signs of the disease ; no other person in the house suffered from it. Into the room occupied by these two persons, the foul air from the closet, as proved by experiment, naturally ascended.
Página 23 - ... influence at work, which human means cannot successfully cope with. So far, however, from this being the case, Mr. Maclean expressly states, that ' the air of the island is good, and the water excellent ;' that ' there is no visible defect on the part of Nature;' and that, on the contrary, 'the great, if not the only, cause is the filth amidst which they live, and the noxious effluvia which pervades their houses.
Página 287 - ... upon health. Therefore, if a large proportion of organic matter was removed by the process of oxidation, the quantity left might be quite sufficient to be injurious to health. With regard to the oxidation, we know that to destroy organic matter the most powerful oxidizing agents are required ; we must boil it with nitric acid and chloric acid and the most perfect chemical agents. To think to get rid of organic matter by exposure to the air for a short time is absurd.

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