The Mining World, Volume 43Mining World Company, 1915 - Mineral industries |
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Alaska Ariz Arizona assaying average blast furnace British Columbia Butte camp capacity cars coal Coeur d'Alene Colo compressor concentrates conveyor copper cost Creek crosscut cyanide deposits depth district dividend dredge drift drill Duenweg electric engineer equipment furnace geology gold grade high-grade hoisting Idaho increase industry installed iron Joplin July 15 July 24 July 31 June June 19 June 26 Lake lead lease lode machine machinery manager ment metal Metallurgy method miles mill mineral Mineral Point MINING WORLD Mont months Nevada operations output plant production pumps reported rock S. P. July Salt Sept shaft shipments shipped showing silver smelter smelting South steel sulphide tion tonnage Tonopah tons tunnel United Utah vein Webb City week World July York zinc