Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 165
ll 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 invert- ed cup on the inside…
Mechanical movements
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