• Scientific American 1894-04-21 916 visits Scientific American 1894-04-21
  • Scientific American 1894-04-28 1037 visits Scientific American 1894-04-28
  • Scientific American 1894-05-05 895 visits Scientific American 1894-05-05
  • Scientific American 1894-05-12 1016 visits Scientific American 1894-05-12
  • Scientific American 1894-05-19 980 visits Scientific American 1894-05-19
  • Scientific American 1894-09-08 977 visits Scientific American 1894-09-08
  • Scientific American 1894-09-15 977 visits Scientific American 1894-09-15