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Calumet and Hecla

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Manufacturing Process, Manpower, Labor Cathode plates, 99.9 pure copper, leaving electrolytic plant for smelter, Calumet-Hecla mill, Lake Linden, Mich. [Several railroad flat cars are loaded with the plates ready for shipment. A man holding a cigar looks on.]

Scanned: December 15, 2009


Calumet and Hecla

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Manufacturing Process, Manpower, Labor Sand leaching plant where copper is removed from sand by ammonia process. Calumet & Hecla mills, Lake Linden, MI.

Scanned: December 15, 2009


Calumet and Hecla

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Manufacturing Process, Mills and Millwork, Manpower, Labor Pouring molten copper into ingot molds, Calumet-Hecla Mines, Calumet, Mich. [A worker pays close attention to filling the molds.]

Scanned: December 15, 2009