Digital Commonwealth — Boston Public Library
A Vital Wartime Metal - Rhodochrosite Ore, or manganese carbonate in combination with sulphides of zinc and lead comes to the surface of the Emma mine in "skips" and is then dumped on a belt conveyor for loading into trucks carrying it to the reduction plant of the Anaconda Copper Mining Company.
Wide World Photos, Inc. · [ca. March 1942]
[Information from item housing] Manganese--Manganese
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