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      Knowledge is Power

      Scientific American June 18, 1870

      Thirty-Ninth Industrial Exhibition of the American Institute

      • June 18, 1870

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      More in the June 18, 1870 issue of Scientific American
      • New Books and Publications- June 18, 1870
      • Recent American and Foreign Patents- June 18, 1870
      • Business and Personal- June 18, 1870
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