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      Scientific American December 11, 1915

      Relics of Ancient Costa Rica

      Metal-Working Methods of Primitive Central American Artisans Disclosed by Recovered Ornaments

      • By Walter L. Beasley on December 11, 1915

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      More in the December 11, 1915 issue of Scientific American
      • Difficult House-Moving Feat to Save Trees, Labor-Saving Equipment for Concrete Road Building and more
      • Inventions New and Interesting - December 11, 1915
      • Strategic Moves of the War, December 4th, 1915
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