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Scientific American, Vol. 77, No. 5 (July 1897) (1897)
leaf 3
e from bacteria. In time the film of impurities on the surface of thesand becomes so thick that not enough water can passthrough it to meet the demand, and the filters then re-quire cleaning. This is effected by scraping the filmor blanket, as it is called, from the surface of thefilter bed, care… … METHOD OF CONSTRUCTING FILTER BED AT LAMBERTVILLE, N. J. radiator can get beyond the trap attached to it. Themanufacturer is in the possession of many recordsshowing material savings in establishments equippedwith the Heintz traps, a,nd a recent communicationfrom the Massachusetts Institute ©f…Beet · Beets · Bicycle · Sugar · Scientific American · Munn · Low pressure · Fly wheel · Trade mark · Years ago · Beet sugar · Sewing machine · Declination north · Sugar beet · Chino valley
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