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      Knowledge is Power

      Scientific American September 23, 1911

      The Great Star Map—IV

      Star Positions

      • By H. H. Turner on September 23, 1911

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      More in the September 23, 1911 issue of Scientific American
      • Loaded Telephone Cables
      • The Hot Air Balloon of the Twentieth Century
      • A Continuous Unloader at Work
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