Public domain
Untitled photo, possibly related to: Anaconda smelter, Montana. Anaconda Copper Mining Company. Poling in the refininf furnace. Wooden pole are plunged into the molten copper; there is a great evolution of gases when this is done and the excess oxygen combines with the carbon of the the wood and pas
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUntitled photo, possibly related to: Anaconda smelter, Montana. Anaconda Copper Mining Company. Poling in the refininf furnace. Wooden pole are plunged into the molten copper; there is a great evoluti. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.