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Updated: May 13, 2025
She might even come in time to take up his line, and become a cleverer crook than he is, but we're not going to let that happen. We'll stop him, right enough, before he goes too far with her. What's he doing now?" "Walking in the park with her. She met him at the gates, and Vanner took the job there of tailing them, while I came on down to report to you." "Good work, Ross.
"The power necessary for different mill parts is: For each 850lb. stamp, dropping 6 in. 95 times per minute, 1.33 h.-p. For each 750lb. stamp, dropping 6 in. 95 times per minute, 1.18 h.-p. For each 650lb. stamp, dropping 6 in. 95 times per minute, 1.00 h.-p. For an 8-inch by 10-inch Blake pattern rock-breaker 9.00 h.-p. For a Frue or Triumph vanner, with 220 revolutions per min. 0.50 h.-p.
The Frue vanner is an endless indiarubber band drawn over an inclined table, to which a revolving and side motion is given by ingenious automatic mechanism, the pulp being automatically fed from the upper end, and the concentrates collected in a trough containing water in which the band is immersed in its passage under the table; the lighter particles wash over the lower end.
Riffles are provided and even very fine gold is sometimes effectively recovered by their aid. The Frue vanner will, as a rule, act well when the pulp is sufficiently fine. It is really a adaptation of an old and simple apparatus used in China and India for washing gold dust from the sands of rivers.
The cloth is thus dragged upwards against a small stream of water and sand fed to it by a second man, the first man not only turning the handle but giving a lateral motion to the band by means of a rope tied to one side. Chinamen were working these forerunners of the Frue vanner forty years ago in Australia, and getting fair returns.
They had gone but a short distance up when they stopped at a spot where the streamlet widened out into a pool. "Let us try here," Jerry said, "and see if there is any sign." Half a shovelful of sand was placed in the vanner with a small quantity of water, and while Harry and Sam proceeded to wash some gravel roughly in the pans, Tom stood watching Jerry's operations.
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