Some Recent Innovations in Canadian Milling Practice, 1939

THIS paper is a further compilation of contributions from millmen throughout Canada in response to a circular letter sent out by W. B. Timm, Chief, Bureau of Mines, dated May 27th, 1939, as follows:
Keywords: Air, arsenious oxide, cyanide, jig, pyrite, Star Gold Mines, Limited, Canadian, Concentrate, Concentrates, Gold, Ore, Ores, Plants
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