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Calumet & Hecla Stamp Mill

Metal Trade, Copper Industry and Trade, Manufacturing Process, Mills and Millwork, Buildings Calumet & Hecla Stamp Mills. Hecla Mill [Interior view of building showing various pieces of machinery]

Scanned: October 10, 2006


Calumet & Hecla Stamp Mill

Metal Trade, Copper Industry and Trade, Manufacturing Process, Mills and Millwork, Buildings Calumet & Hecla Stamp Mills. Hecla Mill, Wash. [Interior view of the mill]

Scanned: October 10, 2006


Calumet & Hecla Stamp Mill

Metal Trade, Copper Industry and Trade, Copper Mines and Mining, Manufacturing Process, Mills and Millwork, Buildings Calumet & Hecla Stamp Mill at shaft #4 [Stamp mill with Shaft #4 in the right side of the photograph]

Scanned: October 16, 2007


Stamp Mills

Manufacturing Process, Mills and Millwork, Metal Trade, Copper Industry and Trade, Buildings Wolverine and Mohawk Stamp Mills [A line of carts carrying copper rich rock wait to move into a stamp mill where the rock will be crushed]

Scanned: September 27, 2007