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      Knowledge is Power

      Scientific American October 18, 1873

      Letter from United States Commissioner Professor R. H. Thurston

      Number 14

      • October 18, 1873

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      More in the October 18, 1873 issue of Scientific American
      • Business and Personal - October 18, 1873
      • Recent American and Foreign Patents - October 18, 1873
      • The Fossil Man of Mentone
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