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      Scientific American April 22, 1911

      The Gordon Bennett International Aviation Trophy

      • By Earle L. Ovington on April 22, 1911

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      More in the April 22, 1911 issue of Scientific American
      • An Adjustable Rose Reamer
      • How to Rebore a Crank-pin Hole in a Locomotive Driving-wheel
      • Removing Old Boiler Tubes, A Handy Drill Socket and more
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