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The Cost Of Milling Silver Ores In Utah And Nevada

We have The Cost Of Milling Silver Ores In Utah And Nevada,1926. the costs of mining and milling had been . underestimated, partly because the ore proved sticky and difficult to process. to make matters worse, the ores value had been overestimated, and silver continued to fall in value from a dollar an ounce in 1920, to about 67 cents an ounce in

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