HISTORIC PHOTOGRAPH SHOWING BILL KEYS PROBABLY WRINGING AMALGAM IN CHAMOIS, FORCING MERCURY INTO GOLD PAN. Courtesy Library of Congress, Prints & Photographs Division, HAER, Reproduction HAER CAL,36-TNPAL.V,2-37
This photograph is by carnkie and was uploaded January 21st 2010. © carnkie please do not copy or distribute without prior express permission.
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