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      Knowledge is Power

      Scientific American August 1924

      Telephoning Our Press Photographs

      Ingenious and Practical System of Image Transmission Worked Out by Bell System Engineers

      • August 1, 1924

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      More in the August 1924 issue of Scientific American
      • The "Margery" Mediumship--I
      • The Assault on Mount Everest
      • The Story of Steel--VII
      View Full Contents
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