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      Spring Flash Sale

      Scientific American March 09, 1912

      A Mechanical Violin Player

      How a Bow with 3,000 Horsehairs Solved a Difficult Problem

      • March 9, 1912

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      More in the March 09, 1912 issue of Scientific American
      • Four-dimensional Space
      • Recently Patented Inventions - March 9, 1912
      • Hoarding up Happiness
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