• Scientific American 1894-07-07 927 visits Scientific American 1894-07-07
  • Scientific American 1894-07-21 967 visits Scientific American 1894-07-21
  • Scientific American 1894-07-28 975 visits Scientific American 1894-07-28
  • Scientific American 1894-08-11 1004 visits Scientific American 1894-08-11
  • Scientific American 1894-08-25 908 visits Scientific American 1894-08-25
  • Scientific American 1894-09-01 953 visits Scientific American 1894-09-01