Stamp mill

Definition and stakes

Various,  Stories from Everybody's Magazine

“ How far is it from your mine dump to the nearest bank?"
"About five miles," he answered.
"In that case," said I, "it seems to me you don't need to sell a hundred thousand dollars' worth of stock to build a stamp-mill. You need only enough to buy yourself a good, strong wheelbarrow. In two or three months you can thus build your own stamp-mill and pay for it with ore, and still have your mine all in your own hands."
”
Source: Gutenberg

Charles A. Bramble,  The A B C of Mining: A Handbook for Prospectors

“ This is practically a very simple, crude, stamp mill. On the end of a solid log, firmly fixed in the ground and standing four feet or so above the surface, a square 6-inch hole is cut in which are fitted wrought iron bars 3 inches deep by 1⁄2 inch wide, and separated by equal intervals. These bars taper below so as to permit free passage of the pounded mineral. A wooden box surrounding the grating keeps the ore in place. A block of wood, shod with iron, forms the stamper. The miner hauls on the handles at every blow. The gold is saved on the lower table. ”
Source: Gutenberg

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