[K]. Estimated.
[L]. Dept. of Mines Reports (platinum obtained from copper matte).
The market value of platinum has risen considerably since 1880. In that year the price was 12s. 7½d. per oz. troy, in 1890 it was 25s. 3d., and in 1900, 63s. 1½d. The average prices in London and New York for the years 1910–1919 were as shown on the accompanying tables:
| Average price in pounds per troy oz. of refined metals of the platinum group in London | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1910. | 1911. | 1912. | 1913. | 1914. | 1915. | 1916. | 1917. | 1918. | 1919. | |
| Platinum Metals | 9·1 | 8·6 | 9·5 | 9·5 | 8·1 | 10·9 | 10–14·5 | 14·5 | 20 | 24 |
1910, 1915, 1916 and 1917—Metal Market Year Book. 1911, 1912, 1913 and 1914—Mining Magazine.
| Average price in dollars per troy oz. of refined metals of the platinum group in New York | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1910. | 1911. | 1912. | 1913. | 1914. | 1915. | 1916. | 1917. | 1918. | 1919. | |
| Platinum | 33 | 43 | 46 | 45 | 45 | 50 | 84 | 103 | 106[[M]] | 114 |
| Iridium | 65 | 83 | 94 | 150 | ||||||
| Iridosmine | 33 | 35 | 45 | 80 | ||||||
| Palladium | 44 | 56 | 67 | 110 | ||||||
1910, 1914, 1915, 1916 and 1917—U.S. Geol. Surv. Mineral Resources.
1911, 1912, 1913, 1918 and 1919—Eng. and Min. Journ., vol. 107, No. 2, p. 77.
[M]. The price was fixed on May 14, 1918, at $105.