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      Scientific American December 1935

      Planetarium Staff, Photo-Cell Output and more

      • By F. D. McHugh, Alexander Klemin, A. E. Buchanan Jr.

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      More in the December 1935 issue of Scientific American
      • Colorado River's Newest Dam
      • Our Point of View, December 1935
      • Wide Spectrum Lines and Small Stars
      View Full Contents
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