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      Knowledge is Power

      Scientific American April 04, 1903

      Photographic Experiment with Nature's Lenses

      • By W. F. Watson on April 4, 1903

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      More in the April 04, 1903 issue of Scientific American
      • Business and Personal Wants
      • Index of Inventions - April 4, 1903
      • Some Modern Appliances for Life Saving at Fires
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