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      Knowledge is Power

      Scientific American December 30, 1916

      Heating a Porous House, Unloading Coal Cars by Turning Them Upside Down, and more

      • By George H. Cashing on December 30, 1916

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      More in the December 30, 1916 issue of Scientific American
      • Inventions New and Interesting- December 30, 1916
      • A Strange Botanical Garden
      • Making Lime from Marble
      View Full Contents
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