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Ch. 2: Platinum in 1922

Ch. 2: Platinum in 1922 Page of 54 Ch. 2: Platinum in 1922 Text size:minus plus Restore normal size   Mail page  Print this page
126
MINERAL RESOURCES, 1922----PART I.
New platinum metals recovered by refiners in the United States in 1921-1922, by sources,
in troy ounces.
SECONDARY METALS.
Secondary platinum metals are those recovered from the treat­ment of scrap metal, sweeps, and other waste products of manu­facture that contain platinum. Although the figures given in the following table undoubtedly contain some duplication, it is believed that they are of importance, for the secondary metals constitute a considerable item—22 per cent in 1922—of the total platinum metals available for consumption in the United States:
Secondary platinum and allied metals recovered in the United States in 1918-1922, in
troy ounces.
Ch. 2: Platinum in 1922 Page of 54 Ch. 2: Platinum in 1922
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US Geol. Surv. 1922. Gemstones, Metals.
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