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      Knowledge is Power

      Scientific American November 23, 1918

      The Current Supplement, Largest Automatic Phone Exchange, and more

      • November 23, 1918

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      More in the November 23, 1918 issue of Scientific American
      • Canada's New Niagara Development
      • Recently Patented Inventions- November 23, 1918
      • Our Aerial Sausages
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