The Filtration of Public Water-supplies
J. Wiley & Sons, 1896 - Filters and filtration - 197 pages
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acre daily actually allowed Altona Appendix average bacteria beds Berlin built calculated capacity cause cent cholera cleaning companies comparatively connection considerable construction continuous cost covered daily deaths depth drains drawn effective efficiency effluent engineers entire epidemic especially examinations experiments feet filter-beds finer frictional gallons per acre German given gives gravel greater Hamburg Health inches increased Journal lake larger Lawrence layer less limit London loss of head material matter method miles million gallons nearly necessary obtained open filters operation particles passing places plans polluted population possible present pumping purified quantity of water rate of filtration raw water reduced regard regulating removed Report reservoir river sand scraping secure separately sewage shown sides single sizes smaller sources Stralau supply surface taken temperature tion typhoid fever usually vaulting washing water-supplies winter