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      Scientific American July 28, 1917

      The Unipolar Dynamo and its Future

      A Simple and Efficient Type Possessing Great Possibilities

      • By Louis B. Lawrence on July 28, 1917

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      More in the July 28, 1917 issue of Scientific American
      • Achrodextrinase
      • Gravitational Attractions
      • Electric Heating of Steam Boilers
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