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Ch. 2: Platinum in 1921

Ch. 2: Platinum in 1921 Page of 50 Ch. 2: Platinum in 1921 Text size:minus plus Restore normal size   Mail page  Print this page
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MINERAL RESOURCES, 1921----PART I.
New platinum and allied metals recovered by refiners in the United States in 1917-1921, in
troy ounces.
Of the total quantity of new platinum metals recovered in 1921, it is estimated that 4,800 ounces can be safely assumed to have been derived from domestic sources.
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—nearly 26 per cent in 1921—of the total platinum metals available for consumption in the United States:
Secondary platinum and allied metals recovered in the United States in 1917-1921, in
troy ounces.
IMPORTS AND EXPORTS.1
The imports of platinum and allied metals for consumption in 1921 were approximately 20 per cent less in quantity than in 1920, but were 15 per cent greater than the imports in 1919.
i The data for imports and exports were compiled bv J. A. Dorsey, of the U. S. Geological Survey, from the records of the Bureau of Foreign and Domestic Commerce, Department of Commerce.
Ch. 2: Platinum in 1921 Page of 50 Ch. 2: Platinum in 1921
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US Geol. Surv. 1921. Gemstones, Metals.
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