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      Scientific American March 25, 1911

      Head Noises and how one Scientist Studies Them

      Dr. Marage's Wonderful Machine

      • By Jacques Boyer on March 25, 1911

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      More in the March 25, 1911 issue of Scientific American
      • New York's Automobile Fire Service
      • Simple Hydro-comparators
      • The Triumph of Intellect Over Instinct
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