Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 166
depth of six inches, then a layer of sharp, clean sand six inchesthick, a layer of charcoal four inches thick, and a final layer of sandsix inches thick. tion of 578. 577. FILTERING CIS-TERN.—The rain-water iscaught in a flat filter basin withgravel and sand spread on aperforated floor and… … «S6 HYDRAULIC POWER AND DEVICES.
Mechanical movements
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