The platinum metals

by Arthur Douglas Lumb

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[24]. Versfield, W.: Rept. on Metal Resources of Union of S. Africa, 1918.

[25]. Goodchild, W. H.: Trans. Inst. Min. and Met., 1916–17, 26.

[26]. Bettel, W.: S. African Mines, Nov. 10, 1916.

[27]. Hall, A., and Humphrey, W. A.: “The Chromite Deposits of the Bushveld Plutonic Complex,” Trans. Geol. Soc. S. Africa, 1908, 11, pp. 75–6.

[28]. Mining Journ., Feb. 29, 1913.

[29]. Mackenzie, G. C.: Can. Min. Inst. Bull., April 1919.

[30]. Camsell, C.: Mining Journ., May 1914, p. 523.

[31]. Uglow, W. L.: “Geology of Platinum Deposits,” Eng. Min. Journ., Aug. 30, 1919; Sept. 6, 1919.

[32]. Chem. Trade Journ., 1911, 49, p. 271.