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      Scientific American December 26, 1914

      Air Transparency for Infra-Red Rays

      Application of These Rays to Telephotography

      • By G. Michaud on December 26, 1914

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      More in the December 26, 1914 issue of Scientific American
      • Recently Patented Inventions- December 26, 1914
      • War Experiences of an Air Scout--I
      • Index- December 26, 1914
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