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Hints on Amalgamation and the General Care of Gold Mills (Classic Reprint)

Hints on Amalgamation and the General Care of Gold Mills (Classic Reprint)

33477079
1187.5 руб.
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Описание
Excerpt from Hints on Amalgamation and the General Care of Gold Mills

Gold has been known from the earliest ages, from its occurrence in a metallic state in sedimentary deposits as well as in veins. On account of its great specific gravity, it can be collected from placers and river beds, by separation with water alone, and in veins after the matrix is crushed, a great amount is saved by the same simple method. When only rich deposits were exploited, anybody could manage as it apparently required only labor and opportunity, while as long as money was made, the losses that occurred did not trouble the own ers. From this very simplicity of working, the major ity of owners and investors imagined that no special training was requisite to insure success, but that any trustworthy man, skilled in mercantile pursuits, was the proper person for the place of general manager. To-day the same opinion is held by very many, in spite of the warnings from hosts of disastrous failures. One cause for this belief has been the lack of literature for this special branch of metallurgy; in fact, very near 1890, there was practically no works written at all which spoke of gold except as a subsidiary product of the metallurgy of other metals. Volumes, both prae tical and scientific, have been published which deal with the special branches of the metallurgy of lead, copper.

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