File:Steam point.jpg
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DescriptionSteam point.jpg |
English: Diagram of a steam point, as used thaw frozen gravel for gold mining. The point was driven in with a light hammer and turned as it went in, letting the steam do most of the work. steam points as long as 20 ft were used ahead of dredges, while 8 ft was a more typical length in underground mining. |
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Date | copyright 1909 | |||||||
Source | Through the Yukon and Alaska [1] Mining and Scientific Press, San Francisco, 1909 p216. | |||||||
Author | T.A. Rickard | |||||||
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current | 20:14, 4 December 2010 | 667 × 1,673 (46 KB) | Dankarl (talk | contribs) | {{Information |Description={{en|1=Diagram of a steam point, as used thaw frozen gravel for gold mining. The point was driven in with a light hammer and turned as it went in, letting the steam do most of the work. steam points as long as 20 ft were used ah |
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