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      Celebrate Math Awareness Month

      Scientific American July 08, 1882

      A New Mercuro Cyanide Intensifying Process for Gelatino-Bromide Plates

      • By J. M. Eder

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      More in the July 08, 1882 issue of Scientific American
      • Carl Wilhelm Scheele
      • John Roach, of New York.—His Ship-Building and his Views
      • On the Intensification of Negatives
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