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      Knowledge is Power

      Scientific American July 03, 1909

      A Museum to Illustrate the Development of Mathematics

      • By Herbert T. Wade on July 3, 1909

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      More in the July 03, 1909 issue of Scientific American
      • A Good Substitute for Leather Belting
      • Handy Man's Surveying Instrument
      • Recently Patented Inventions - July 3, 1909
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