ScientificAmerican1921-03-26.jpg Scientific American 1921-03-19ThumbnailsScientific American 1921-04-02Scientific American 1921-03-19ThumbnailsScientific American 1921-04-02Scientific American 1921-03-19ThumbnailsScientific American 1921-04-02Scientific American 1921-03-19ThumbnailsScientific American 1921-04-02

The Kearsarge -- once a battleship, now a floating crane. Also, "Canada's superpower zone" and "Railroad accidents and their cause".