90 
GRAVEL AND PLACER MINING IN ALASKA. 
[BULL. 263. 
the above-cited case on Deadwood Creek appears to be very nearly 
the same as that given by Mr. E. D. Levat tt for the operations in 
eastern Siberia. 
1 
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ly steam hose 
achinery steel 
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The direct application of jets of dry steam to the gravel bank 
through the agency of driven pipes has been found to be the most etii- 
aL'Or en Siberie orientale. The formula used is: Each breadth of 1 inch of wood applied at the 
foot of the face thaws an equal width oi gravel. 
