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      Knowledge is Power

      Scientific American February 17, 1912

      Aeroplane Efficiency

      A Skeleton Framework of Theory as a Guide for Practical Construction

      • By Al*amp*gacute;ernon E. Berriman on February 17, 1912

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      More in the February 17, 1912 issue of Scientific American
      • Compact Hydroǵen Generators
      • Science Notes
      • A Compact Launch Motor
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