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      Scientific American May 08, 1915

      Hand Grenades, Strategic Positions of the Contending Armies and more

      • By Edward C. Crossman

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      More in the May 08, 1915 issue of Scientific American
      • Plan for the Improvement of Hell Gate, East River, A Black Finish for Iron and more
      • Science and the Forger
      • A System of Long Distance Typewriting
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