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      Celebrate Math Awareness Month

      Scientific American October 21, 1882

      On a Supposed Connection between the Heights of Rivers and the Number of Sunspots on the Sun

      • By Balfour Stewart

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      More in the October 21, 1882 issue of Scientific American
      • Bourdon's Hydro-Pneumatic Motor Clock
      • Streatham Hall
      • The Prune Trade of Bordeaux
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