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Scientific American, Vol. 39, No. 18 (1878) (1878)
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metal contained in the ore, portant saving in time. Weare informed that the test of containing free gold or silver, is fed from the hopper to the and have recovered from 98 to 100 per cent of the mercury everyday use sustains the decision of the American Insti- horizontal tube which leads to the… … THE FORSTER-FIRMIN AMALGAMATOR. © 1878 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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