Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 167
in the bottom,and a small flower-pot saucer inverted over the hole.Then fill in a layer of sharp, clean sand, rather coarse.A layer of finer sand, a layer of pulverized charcoalwith dust blown out, then a layer of sand, the whole occupying one-third of the jar. 582. POROUS WATER FILTER.—The…
Mechanical movements
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