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      Digital & 4-Year Archive

      Scientific American April 17, 1915

      Progress in Aeronautics

      A Review of Recent Air-raids and what they have Accomplished

      • By Major H. Bannerman-Phillips on April 17, 1915

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      More in the April 17, 1915 issue of Scientific American
      • Electrolytic Iron Melted in Vacuo
      • The Thomas Military Tractor Biplane
      • Equilibrium of the Body
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