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      Knowledge is Power

      Scientific American January 1910

      An Automatic Apparatus for Projecting Pictures

      • By Jacques Boyer on January 1, 1910

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      More in the January 1910 issue of Scientific American
      • Electrical Heat Penetration
      • Recently Patented Inventions - January 1, 1910
      • Index of Inventions - January 1, 1910
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