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Williams, J. Morley
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Step 2 of testing and ore sample: Crusher in the mine lab, Minnesota
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Step 1 of testing and ore sample: Gathering ore sample for the mine lab from the ore train, Minnesota
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Step 3 of testing and ore sample: Grinding the sample in the mine lab, Minnesota
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Step 5 of testing and ore sample: Ring stand and crucible, Minnesota
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Step 4 of testing an ore sample: Riffler in the mine lab, Minnesota
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Business and Industry
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Still Image
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Black-and-white photographs
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1940
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1949
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Iron Industry and Trade
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Iron Mines and Mining
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Minnesota Museum of Mining
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