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      Knowledge is Power

      Scientific American October 26, 1907

      The Origin of Radium

      The Search for the Parent Element

      • By Bertram B. Boltwood on October 26, 1907

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      More in the October 26, 1907 issue of Scientific American
      • Elements of Electrical Engineering.—III
      • The African Ostrich Industry
      • The Temperature of the Sun
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