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      Knowledge is Power

      Scientific American October 28, 1916

      How did it Happen?, Manufacture of Bar-Ie-Duc Jelly

      A Novel Hoist Recorder for Mines and Elevators, Designed to Answer this Question

      • By Frank C. Perkins on October 28, 1916

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      More in the October 28, 1916 issue of Scientific American
      • Our Latest Dreadnought, the "New Mexico"
      • Strategic Moves of the War, October 20th, 1916
      • Loading Iron by Magnets
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