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      Scientific American September 18, 1915

      The Telegraph and Telephone in the German Army

      An Elaborate Organization that has Brought About Great Changes in Maneuvers

      • September 18, 1915

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      More in the September 18, 1915 issue of Scientific American
      • Heating and Ventilating
      • A New Weighing Balance
      • Measurement of the Distances of the Stars—II
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