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      Knowledge is Power

      Scientific American December 17, 1910

      Thumb-Indexing a Book, Handy Centers For Lathes

      • By W. J. C on December 17, 1910

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      More in the December 17, 1910 issue of Scientific American
      • Enlarging a Tapped Hole and Reducing a Screw
      • Index of Inventions- December 17, 1910
      • The Largest Ship: The "Europa"
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