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      Knowledge is Power

      Scientific American October 04, 1890

      The Automatic Operation of Photographic Apparatus

      • By D.P. Todd on October 4, 1890

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      More in the October 04, 1890 issue of Scientific American
      • A Hydraulic or Jet-Propelled Steam Lifeboat
      • The Argentine Republic and its President
      • Useful Engineering Books
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