Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 74
54 FILTERING. ing disks are superposed, so that several restoring to it a small proportion of car- of them operate at one and the same bonic acid gas. This is done by \ising time, and thus give a much larger as a lid a flat bottle with a straw hole qviantity of filtered water within the in the side… … Paulson's filter. glass of water are then placed in the bottle, and the result is a sparkling and palatable filtered water. (6) The Johnson filter (Figs. 25, 26) is both mechanical and chemical, and is applicable to both domestic and indus- trial uses. Fig. 25 shows the domestic style, and Fig. 26…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
