File:Mining with steam points.jpg
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DescriptionMining with steam points.jpg |
English: Steam points in place underground in a drift mine in permafrost. The steam thaws the frozen gravel, permitting it to be dug out and washed to recover the gold. |
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Date | copyright 1909 photo 1908 | |||||||||||
Source | Through the Yukon and Alaska [1] Mining and Scientific Press, San Francisco, 1909 p213. | |||||||||||
Author | T.A. Rickard photographer probably Rickard | |||||||||||
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current | 19:52, 3 December 2010 | 2,373 × 1,552 (776 KB) | Dankarl (talk | contribs) | {{Information |Description={{en|1=Steam points in place underground in a drift mine in permafrost. The steam thaws the frozen gravel, permitting it to be dug out and washed to recover the gold.}} |Source=''Through the Yukon and Alaska'' [http://www.archi |
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