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      Scientific American October 21, 1916

      Determining the Age of Blazes

      A Useful Lesson in Woodcraft

      • October 21, 1916

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      More in the October 21, 1916 issue of Scientific American
      • Hydrogen for Military Purposes
      • Suggested Mutual Repulsion of Fraunhofer Lines
      • A Fossil Nutmeg from the Tertiary of Texas
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