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      Knowledge is Power

      Scientific American December 1921

      Abraham Lincoln and the Repeating Rifle

      How an Inventor's Struggle for Recognition Was Assisted by the Action of the President

      • December 1, 1921

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      More in the December 1921 issue of Scientific American
      • A Climax in Concrete Construction
      • Book Reviews, December 1921
      • Eliakim Hastings Moore, Zirconium, the "Mystery Metal"
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