- Scientific American 1915-01-23 2582 visits
- Scientific American 1915-04-17 1433 visits
- Scientific American 1915-05-15 1541 visits
- Scientific American 1915-06-12 1402 visits
- Scientific American 1915-06-19 1519 visits
- Scientific American 1918-06-29 1549 visits
- Scientific American 1918-10-19 1515 visits