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      Knowledge is Power

      Scientific American March 28, 1903

      A New Sighting Gear for Naval Guns and Gunnery Signaling Apparatus

      By Our London Correspondent.

      • March 28, 1903

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      More in the March 28, 1903 issue of Scientific American
      • Business and Personal Wants - March 28, 1903
      • Notes and Queries - March 28, 1903
      • Safety Envelop
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