• Scientific American 1915-01-23 2342 visits Scientific American 1915-01-23
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  • Scientific American 1915-05-15 1259 visits Scientific American 1915-05-15
  • Scientific American 1915-06-12 1160 visits Scientific American 1915-06-12
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  • Scientific American 1918-06-29 1324 visits Scientific American 1918-06-29
  • Scientific American 1918-10-19 1313 visits Scientific American 1918-10-19