gold sluice construction in south africa
gold sluice construction in south africa ; Gold Sluice Boxes for Prospecting. Riffles are purposeful obstructions which slow the movement of gold in the sluice so it can be trapped in miner's moss, carpeting, or rubber matting in the bottom of the sluice. Nineteenth century gold miners used wooden sluices that were at least 12 feet long, but ...
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