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      Celebrate Math Awareness Month

      Scientific American July 29, 1882

      Effects Produced in a Vacuum by the Current of Gramme Machines

      • By MM. Jamin, G. Maneuvrier

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      More in the July 29, 1882 issue of Scientific American
      • Facts and Fancy Concerning Comets
      • Nitric Acid in Soils
      • Process for Printing Anilin
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