• Scientific American 1877-11-03 1353 visits Scientific American 1877-11-03
  • Scientific American 1882-06-10 1600 visits Scientific American 1882-06-10
  • Scientific American 1897-10-23 951 visits Scientific American 1897-10-23
  • Scientific American 1897-11-13 996 visits Scientific American 1897-11-13
  • Scientific American 1897-12-18 982 visits Scientific American 1897-12-18
  • Scientific American 1903-03-07 968 visits Scientific American 1903-03-07
  • Scientific American 1903-09-26 883 visits Scientific American 1903-09-26
  • Scientific American 1903-12-12a 1236 visits Scientific American 1903-12-12a
  • Scientific American 1919-06-14 1141 visits Scientific American 1919-06-14