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Start Over Subject Copper mines and mining Year 1849

1. Geological map of Keweenaw Point, Lake Superior, Michigan

Yale Public content
1849. 2013-11-22T15:27:04Z. 2013-11-22T15:31:01Z. Foster, J. W. (John Wells), 1815-1873. P.S. Duval's Steam Press. English. cartographic image. Public. Michigan, Keweenaw Peninsula, and Keweenaw Peninsula (Mich.).

2. Plan of the underground work of the Lac Labelle Mines

Yale Public content
1849. 2013-08-30T19:00:06Z. 2021-03-23T15:38:16Z. Hill, S. W. (Samuel Worth), 1815-1889. Ackerman Lithr. English. cartographic image. Public. Lac La Belle (Mich.), Michigan, and Lac La Belle.