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“One of the simplest forms of sluice as used in river diggings in the north-west of America. A rectangular trough of boards, whose dimensions depend chiefly on the size of the planks available, is set up on the higher part of the ground at one side of the claim to be worked, upon trestles or piers of rough stone-work, at such an inclination that the stream may carry off all but the largest stones, which are kept back by a grating of boards about 2 inches apart at a.” — Encyclopedia Britannica, 1893




The Encyclopedia Britannica, New Warner Edition (New York, NY: The Werner Company, 1893)


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