The Filtration of Public Water-supplies |
Common terms and phrases
acre daily algæ allowed Altona alum apparatus area of filters bacterial efficiency basins beds Berlin Board of Health Breslau built calculated cent cholera cleaning clogged construction cost covered filters daily quantity death-rate depth diameter Dirty sand drains effective effective size efficiency of filtration effluent Elbe engineers epidemic feet filter-beds filtered between scrapings filtered water filtering area finer frictional resistance gallons per acre German grain gravel Hamburg inches increased Journal für Gas Kirkwood lake large number Lawrence Experiment Station less London seven loss of head Magdeburg mechanical filters millimeter Müggel nitrification number of bacteria open filters operation particles passing Piefke polluted pumped purified quantity of water rate of filtration raw water REESE LIBRARY regulating removed reservoir river river-waters samples sediment layer sedimentation-basins settling-basins sewage sieves Stralau supply surface Tegel temperature tion turbid typhoid fever underdrains unfiltered water vaulting washed sand Wasserversorgung water filtered water-works winter Zürich