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      Scientific American July 15, 1905

      Burke's Own Account of the Spontaneous Action of Radium on Gelatin Media

      • July 15, 1905

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      More in the July 15, 1905 issue of Scientific American
      • A New Aeroplane
      • Improved Methods in High-Speed Chrono-Photography
      • Opening of Extensions of the New York City Subway
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