ScientificAmerican1916-11-25.jpg Scientific American 1916-11-18ThumbnailsScientific American 1916-12-02Scientific American 1916-11-18ThumbnailsScientific American 1916-12-02Scientific American 1916-11-18ThumbnailsScientific American 1916-12-02Scientific American 1916-11-18ThumbnailsScientific American 1916-12-02Scientific American 1916-11-18ThumbnailsScientific American 1916-12-02

American compressed air locomotive used in boring the Rove tunnel.