![](http://www.alamy.com/thumbs/6/62A75EA4-1407-4F68-9D43-FD6648D98FA4/HBYK0G.jpg)
Image taken from page 291 of 'The Metallurgy of Lead and the Desilverization of Base Bullion ... Fourth edition' Image taken from page 291 of 'The Metallurgy of Lead
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Photo credit: © Classic Collection / Alamy / Afripics
License: Licensed
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