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      Scientific American January 21, 1911

      The Geoloǵical Society of America

      Report of the Annual Meeting at Pittsburgh, Penn

      • By E. O. Hovey on January 21, 1911

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      More in the January 21, 1911 issue of Scientific American
      • Maǵnetic Crystals
      • The Light of the Sky
      • The “Holy Mountain”
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