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      Scientific American December 02, 1916

      The United States Lighthouse Service—II

      Its History, Growth and Methods

      • December 2, 1916

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      More in the December 02, 1916 issue of Scientific American
      • Allotropic Changes in Iron and other Metals
      • Observations on the Economy of the House Spider, Tegenaria Atrica
      • An Apparatus for Strengthening the Lungs and Improving Respiration
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