![](http://www.alamy.com/thumbs/6/E21D3164-0245-4395-803C-F2BB033CC982/HBTFR8.jpg)
Image taken from page 259 of 'A Text-book of Ore and Stone Mining ... With frontispiece and 716 illustrations' Image taken from page 259 of 'A Text-book of Ore
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Photo credit: © Classic Collection / Alamy / Afripics
License: Licensed
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