aMore than three-fourths of the silver obtained from America, is extracted from the ore by means of quicksilver: the loss of quicksilver in this operation, Mr. Humboldt estimates has been about 16, 000 quintals a year, and in the whole of America, anbsp;...
Title | : | Commercial Tariffs and Regulations of the Several States of Europe and America Together with the Commercial Treaties Between England and Foreign Countries Presented to Both Houses of Parliament ... |
Author | : | |
Publisher | : | - 1846 |
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