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      Digital & 4-Year Archive

      Scientific American July 1937

      More Horses in the Air

      A 50-Fold Increase in Airplane Engine Power Within 34 Years, Basic Advances, Skill II Design and Research, End Not Yet in Sight

      • By Reginald M. Cleveland on July 1, 1937

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      More in the July 1937 issue of Scientific American
      • A Family of Guereza Monkeys from Ethiopia
      • Is Nature Kind?
      • The Submarine in the Next War
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