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      Knowledge is Power

      Scientific American April 1922

      Making Two Dirigible Sheds into One, Four-Footed Transatlantic Passengers

      • April 1, 1922

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      More in the April 1922 issue of Scientific American
      • A Drill for the Tree-Dentist, Auto-Bus Stability, and more
      • At the Sending End of Radio
      • Curbing the Colorado
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