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      Scientific American July 02, 1910

      The Gould 15,000 Prize Contest, The Annual Slaughter of Trespassers on Railroads, and more

      • July 2, 1910

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      More in the July 02, 1910 issue of Scientific American
      • Curiosities of Science and Invention- July 2, 1910
      • New Books, Etc.- July 2, 1910
      • Dictating Letters by Telephone
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