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      Scientific American December 28, 1918

      Recently Patented Inventions - December 28, 1918

      • 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
      • The Truck Triangle
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