Editorial note — Chapter I · PLATINUM METALS: THEIR OCCURRENCES, CHARACTERS AND USES
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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).