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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 |
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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 |
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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 |