Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 167
^^^^^C^^<l^<^vC««l^^ … 579. UPWARD. FLOW FILTER.— A perforated floor is made of any desired filtering capacity and charged with layers of gravel, coarse and fine sand, with an inflow and overflow, as in the cut. A wash-out outlet should be made in the bottom of the lower compartment. 580. DOMESTIC FILTER.—To make a…
Mechanical movements
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