Silver and Gold: an Account of the Mining and Metallurgical Industry of the United States: With Reference Chiefly to the Precious MetalsJ.B. Ford, 1873 - 566 من الصفحات |
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الصفحة
With Reference Chiefly to the Precious Metals Rossiter Worthington Raymond. T 1 1 1 1 1 SILVER AND GOLD ; AN ACCOUNT OF.
With Reference Chiefly to the Precious Metals Rossiter Worthington Raymond. T 1 1 1 1 1 SILVER AND GOLD ; AN ACCOUNT OF.
الصفحة 18
... silver , but no comparison between the work- ing of the two metals . This plan of seeing how much can be pounded up ... silver associated with the gold - bearing quartz : That there has been still too great a wastage of precious ...
... silver , but no comparison between the work- ing of the two metals . This plan of seeing how much can be pounded up ... silver associated with the gold - bearing quartz : That there has been still too great a wastage of precious ...
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