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mill manual for mining

mill manual for mining

Here is an Ancient Gold OreMillingProcess 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 scientificmining, now making itself slowly felt

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