Image: Mill and cyanide plant of the Champion-Providence Group
Mill_and_cyanide_plant_of_the_Champion-Providence_Group.png (260 × 449 pixels, file size: 100 KB, MIME type: image/png)
Description: Mill and cyanide plant of the Champion-Providence Group. Photo by C. A. Logan.
Title: Mill and cyanide plant of the Champion-Providence Group
Credit: California State Mineralogist (1919) Report of the State Mineralogist (Public domain ed.), California State Office
Author: California State Mineralogist
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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