• Scientific American 1899-01-28 1027 visits Scientific American 1899-01-28
  • Scientific American 1899-02-25 865 visits Scientific American 1899-02-25
  • Scientific American 1899-03-11 1061 visits Scientific American 1899-03-11
  • Scientific American 1899-07-15 1020 visits Scientific American 1899-07-15