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      Knowledge is Power

      Scientific American December 11, 1915

      A 5,000-Volt, Direct Current Electric Railway

      Operating Trolley Cars with the Highest Voltage Yet Attempted

      • By Irving B. Smith on December 11, 1915

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      More in the December 11, 1915 issue of Scientific American
      • Economies in Operating small Cars
      • Gathering Storax from the Sweet Gum Tree
      • Science and the War
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