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      Knowledge is Power

      Scientific American December 28, 1918

      An Airplane Built to be Shot Down, Baby Chicks by Parcel Post and more

      • December 28, 1918

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      More in the December 28, 1918 issue of Scientific American
      • Electrically-Heated Soles for the Aviator's Cold Feet, Where Camouflage Robes Were Made and more
      • Recently Patented Inventions - December 28, 1918
      • The Truck Triangle
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