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      Scientific American July 06, 1918

      The Safety Zone for the Submarine

      Is It Better to Face the Gun than the Depth Bomb?

      • By Percival A. Hislam on July 6, 1918

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      More in the July 06, 1918 issue of Scientific American
      • Recently Patented Inventions- July 6, 1918
      • The Use of Patented Inventions by the United States Government
      • Correspondence- July 6, 1918
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