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Silver and lead smelting

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Photograph from San Francisco by American photographer Carleton E Watkins (1829-1916), 1871-1891. This was one of a pair of stereophotographs. Watkins focused mainly on landscape photography, and Yosemite Valley was one of his favorite subjects. Notice the stacked piles of large ingots (presumably lead, but possibly silver). (Courtesy of the Rijkmuseum, Amsterdam, The Netherlands. Public domain. Edited by Dr. Douglas J Lanska.)