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      Scientific American May 30, 1908

      An Oral System of Telegraphy

      • By Gustave Michaud on May 30, 1908

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      More in the May 30, 1908 issue of Scientific American
      • Incandescent Gas Lamp with Self-Generated Forced Draft
      • New Books, Etc. - May 30, 1908
      • The British "Dreadnought" Cruisers
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