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Ball Mill Gold Colorado 1800s

Gold mill machine.Gold processing mill youtube.Here is an ancient gold ore milling process used in china in the 1800s we might use it again after ww3 at the time 1890 the author said there is of course nothing for us to learn from this imperfect and rudimentary gold-extraction process described here which is doubtless destined to disappear ere long before the progress of scientific mining.

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