On May 20, 1873, a patent was issued by the U. S. Patent Office in Washing ton, D. C. for an item which was needed for the continued progress and success of placer miners in California. Those panning …
On May 20, 1873, a patent was issued by the U. S. Patent Office in Washing ton, D. C. for an item which was needed for the continued progress and success of placer miners in California. Those panning …
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