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      Knowledge is Power

      Scientific American May 09, 1903

      The Planimeter, Explained simply, without Mathematics

      • By W. J. Tennant on May 9, 1903

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      More in the May 09, 1903 issue of Scientific American
      • Launch of the Argentine Cruiser “Moreno”
      • The Danvin Dust Collector
      • A New Process for Making Briquettes
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