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65 mesh A. G. McGregor Agnew Alaska Allis-Chalmers Company Anaconda build Calumet and Arizona Cananea Cates chief engineer chrome closed circuit Copper Cliff Copper Company diameter discharge end Dorr classifier drafting end rod mill equipment experience experimental flotation furnace George Bradley GOLD MINES grate Greenway grinding H. K. Burch Hardinge mills inch feed Inspiration installation International Nickel Klepetko Lambourne later low pulp line manager Marcy ball mill Marcy mills Marcy open end Marcy rod mills Marcy says Marcy's ment mill grinding mill superintendent milling plant Mining Company mining history Molybdenum Morenci motor Mueller Nacozari open end rod Oscar Johnson pany Phelps Dodge Corporation Philip Carey president primary grinding Repath Ricketts Roan Antelope Salt Lake City scheelite Smelter Supply Company tion Tobe tonnage tons daily tons per day tube mills U. S. Vanadium Utah Copper winnow Wraith