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Ch. 2: Platinum in 1912

Ch. 1: Gold and Silver in 1912 Page of 93 Ch. 2: Platinum in 1912 Text size:minus plus Restore normal size   Mail page  Print this page
PLATINUM AND ALLIED METALS.
1057
rocker concentrates reported to contain platinum were collected by a representative of the United States Geological Survey, and showed no platinum content on analysis by Ledoux & Co., of New York.
Production of refined platinum from domestic sources, 1903-1912, in troy ounces.
Ch. 1: Gold and Silver in 1912 Page of 93 Ch. 2: Platinum in 1912
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US Geol. Surv. 1912. Gemstones, Metals.
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