Grabill - Clean Up day at the Deadwood Terra Gold Stamp Mill

Författare/Upphovsman:

John Grabill

Kreditera:

This image is available from the United States Library of Congress's Prints and Photographs division
under the digital ID ppmsc.02615.
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Kort länk:

https://sewiki.info/b/2e0d2

Källa:

Wikimedia Commons

Upplösning:

5113 x 4075 Pixel (2486574 Bytes)

Beskrivning:

Original title

The Interior. "Clean Up" day at the Deadwood Terra Gold Stamp Mill, one of the Homestake Mills, Terraville, Dakota

Interior of the Deadwood Terra Gold Stamp mill. Crushed ore is washed over mercury coated copper sheets, whence fine gold particles form an almagam with the mercury. The amalgam was scraped off and the gold then separated from the amalgam by heating and evaporating the mercury which was then recovered by a condenser for reapplication to the plates

Licens:

Public domain