Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 928
e sides. k, A partition reaching from the top of the box to a little below the perforated plate I. Its use is toprevent the escape of the water and earthy matters, which are thrown on the sieve or perforated plate.The machine is then brUkly rocked, by alternately raising and depressing the handle… … operation is going on, and when the gold (or amalgam, if mercury be used) is to be taken out, the plugsmay be cautiously drawn out, so as to permit the water between the ribs to escape without losing theprecious metal. The box may be of wood, but for permanent locations, it should be constructed of…
Mechanical engineering
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