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Horizontal Map Virginia Mine Workings, Comstock Lode.

Description: Map shows late nineteenth century configuration of mine shafts with lengths, degree of slope, mining companies names, and some mineral content of a portion of the Comstock Load. Relief shown by hachures. Scale [ca. 1:1,200].
Date: 1872
Creator: United States. Army. Corps of Engineers.
Partner: University of Texas at Arlington Library
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