Water-supply: (Considered Principally from a Sanitary Standpoint.)Wiley, 1896 - 504 páginas |
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Water-supply: (Considered Principally from a Sanitary Standpoint.) William Pitt Mason Vista completa - 1896 |
Water-supply: (Considered Principally from a Sanitary Standpoint.) William Pitt Mason Vista completa - 1896 |
Water-supply: (Considered Principally from a Sanitary Standpoint.) William Pitt Mason Vista completa - 1897 |
Términos y frases comunes
acid action Albuminoid ammonia algæ Altona amount annual average bacteria bacteria per cubic Board of Health calcium carbonate carbonic acid cause cent Chem chlorine cholera cleaning color cubic centimetre death-rate deaths deep depth dilute disease dissolved distilled drinking-water epidemic evaporation experiments feet filter-bed filtered water filtration flow forest free ammonia germs grammes ground-water hard water impure inches increase instance intake iron Lake layer litre material miles million Nessler Nitrogen Nitrogen as nitrates number of bacteria observed organic matter oxidation oxygen peaty pipe polluted ponds potable precipitate present pumped purification quantity rain rainfall removed reservoir residue River river-water salt samples sand sea-water sedimentation sewage sewers snow sodium sodium carbonate sodium chloride soil solution spirilla spirillum spring sterilized stream sulphuric acid summer supply surface surface-waters temperature tion Total solids town trace typhoid fever U. S. gallons water-supply well-water
Pasajes populares
Página 503 - Hydraulics. The Flow of Water through Orifices, over Weirs, and through Open Conduits and Pipes.
Página 474 - 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 1000 parts by weight of distilled water.
Página 473 - 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.
Página 309 - As the contents of the water-hole or well are pumped out, they are immediately replenished from the surrounding disgusting mixture, and it is not therefore very surprising to be assured that such a well does not become dry even in summer. Unfortunately, excrementitious liquids, especially after they have soaked through a few feet of porous soil, do not impair the palatability of...
Página 473 - ... 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 172 - Temperature has only a minor influence ; the organisms necessary for purification are sure to establish themselves in a filter before it has been long in use. Imperfect purification for any considerable period can invariably be traced either to a lack of oxygen in the pores of the filter, or to the sewage passing so quickly through that there is not sufficient time for the oxidation processes to take place. Any treatment which keeps all particles of sewage distributed over the surface of sand particles,...
Página 50 - In some of the best of them, thirteen feet long by ten feet broad and six and one-half high, as many as eighty persons pass the night. It is not, then, surprising to learn that the stench is overpowering and the heat like that of an oven. Of 300,000 who visit Juggernaut in one season, 90,000 are often packed together for a week in 5,000 of these lodgings.
Página 251 - ... depth is more apt to be open for subterranean drainage. Altogether forest conditions favor in general larger subterranean and less surface drainage, yet the moss or litter of the forest floor retains a large part of the precipitation and prevents its filtration to the soil, and thus may diminish the supply to springs. This is especially possible with small precipitations. Of copious rains and large amounts of snow water, quantities, greater or less, penetrate the soil, and according to its nature...
Página 393 - Gradual evolution of albuminoid ammonia indicates the presence of organic matter, whether of vegetable or animal origin, in a fresh or comparatively fresh condition, while rapid evolution indicates that the organic matter is in a putrescent or decomposing condition.
Página 50 - ... of it is a loathsome mass, unfit for human food. Yet it forms the chief sustenance of the pilgrims, and is the sole nourishment of thousands of beggars. Some one eats it to the very last grain. Injurious to the robust, it is deadly to the weak and wayworn, at least half of whom reach the place suffering under some form of bowel complaint.