Subject: Copper mines and mining / Year: 1870 - Yale University Library GeoBlacklight Search Results

Start Over Subject Copper mines and mining Year 1870

1. Land of the Seneca Mining Co., Lake Superior, Michigan

1870. 2018-12-19T21:27:51Z. 2019-03-15T17:33:49Z. Endicott & Co. (New York, N.Y.), cartographer. Endicott & Co., lith, 59 Beekman St. English. cartographic image. Public. Michigan and Keweenaw County.

2. Map of property of the Globe Copper Company and mines in the Portage Lake District

1870. 2011-02-08T18:57:34Z. 2019-03-15T17:31:07Z. J.O. Seymour & Co., cartographer. J.O. Seymour & Co. English. Public. Houghton County (Mich.), Michigan, and Houghton County.