Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 167
579. UPWARD.FLOW FILTER.—A perforated floor ismade of any desiredfiltering capacity andcharged with layers ofgravel, coarse and fine sand, with an inflow and overflow, as in thecut. A wash-out outlet should be made in the bottom of the lower compartment. 580. DOMESTIC FILTER.—To make a filterwith a…
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
