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      Knowledge is Power

      Scientific American June 15, 1918

      The Motor-Driven Commercial Vehicle- June 15, 1918

      • By Victor W. Pag on June 15, 1918

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      More in the June 15, 1918 issue of Scientific American
      • Our Wartime Barrel of Oil, The Amazing Case of General Wood, and more
      • Surgery by Mathematical Formula
      • Making America Self-Supporting
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