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The ignorant concentrator buries himself in the object or subject, and allows it to master and absorb himself, while the trained Yogi thinker asserts the "I," and then directs his mind to concentrate upon the subject or object, keeping it well under control and in view all the time. Do you see the difference? Then heed the lesson.
Instead of blanket tables percussion tables are sometimes used, to which a jerking motion is given against the flow of the water and pulp, and by this means the heavier minerals are gathered towards the upper part of the table, and are from thence removed from time to time as they become concentrated. I have seen this appliance doing fairly good work, but it is by no means a perfect concentrator.
Along the edge of the canyon, where the well-borers had developed water, the framework of a gigantic mill and concentrator was rapidly being rushed to completion. On the flats below, where Old Juan's burros had browsed on the scanty mesquite, were long lines of houses for the miners and a power plant to run the great stamps.
Very well; we will suppose a hypothetical case: A, being a prospector, finds a copper mine. He says to himself: "Here's a good property; it ought to make me rich. I won't sell it, I'll hold on to it and work it myself." So far, so good. A starts in to work his mine. He digs therefrom considerable rich ore. And now a problem presents itself. He has no concentrator, no smelter of his own.
As a grinder and concentrator, and in some cases as an amalgamator, when used exclusively for either purpose, the Watson and Denny pan is effective; but although successfully used at one mine I know, the mode there adopted would, for reasons previously given, be very wasteful in many other mines.
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