ScientificAmerican1916-08-26.jpg Scientific American 1916-08-19ThumbnailsScientific American 1916-09-02Scientific American 1916-08-19ThumbnailsScientific American 1916-09-02Scientific American 1916-08-19ThumbnailsScientific American 1916-09-02Scientific American 1916-08-19ThumbnailsScientific American 1916-09-02Scientific American 1916-08-19ThumbnailsScientific American 1916-09-02

Huge farm tractor with bulldozer or tank tracks (half-tracked), hauling some farm machinery (since this is August, probably some early harvest). Food will win the war, or at least find a ready market overseas.