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      Scientific American January 21, 1871

      Official List of Patents- January 21, 1871

      Issued by the U. S. Patent Office for the Week Ending Jan. 10, 1871. Reported Officially for the scientific American.

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      More in the January 21, 1871 issue of Scientific American
      • American Gas Wells
      • Facts and Figures about the Mont Cenis Tunnel
      • Shoemaker's Tool
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