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      Knowledge is Power

      Scientific American January 15, 1910

      An Electric Dredger and Locomotive

      • By Frank C. Perkins on January 15, 1910

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      More in the January 15, 1910 issue of Scientific American
      • Color Action of Metals in Alloys
      • Filters for Ultra-Microscopical Particles
      • Reduction Gear for Steam Turbines
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