1904 South Dakota Black Hills Smelting, Ores, Cyanide, Mines Mining, Plates

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South Dakota School of Mines. Bulletin # 7. 1904."Sulphide Smelting at the National Smelter of the Horseshoe Mining Company, Rapid City, South Dakota.""Laboratory Experiments on the Unoxidized Siliceous Ores of the Black Hills.""The Crushing in Cyanide Solution Process as carried on in the Black Hills of South Dakota."63 pages plus several plates.Ex-library book in fair condition only. Worn, library taped spine, tape hinge repairs & library markings.Inventory B889