C. U.S.A. Mineral Resources, 1917, Geol. Surv.
D. Estimates not available.
E. Records of Geol. Survey, India.
F. Mineral Production, Mines Dept., Canada. Figures are for alluvial production only, and far below actual production figures, not including Ontario production from nickel matte, for which only incomplete information is available. [See p. 25.]
G. Mining Journal, November 30, 1918, p. 700, and Mineral Industry.
H. Mines and Quarries Reports, Home Office.
I. Annual Rept. Dept. of Mines.
J. Mineral Industry. These are official figures for production; actual production is much greater than these.
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.