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      Digital & 4-Year Archive

      Scientific American October 17, 1903

      Testing the Specula of Reflecting Telescopes

      A Correction of a Well-Known Formula

      • By James Alexander Smith on October 17, 1903

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      More in the October 17, 1903 issue of Scientific American
      • Engineering Notes
      • Producing Helium from Radium
      • The First Transmission of Energy in Europe by means of Triphase Currents
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