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      Scientific American June 21, 1913

      The Double and Binary Stars

      Over Ten Thousand Twin Stars Are Known

      • By F. W. Henkel on June 21, 1913

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      More in the June 21, 1913 issue of Scientific American
      • Against the Sun
      • Cinematography Carried to Extremes in the Marey Institute
      • The Existence of an Ultra-Neptunian Planet
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