Popular Mechanics 1940-10.jpg Popular Mechanics 1909-05ThumbnailsScientific American 1875-08-14Popular Mechanics 1909-05ThumbnailsScientific American 1875-08-14Popular Mechanics 1909-05ThumbnailsScientific American 1875-08-14Popular Mechanics 1909-05ThumbnailsScientific American 1875-08-14Popular Mechanics 1909-05ThumbnailsScientific American 1875-08-14
Giant bulldozer shown knocking down a tall tree. "Age of Opportunity," by Charles F. Kettering.



Artist:

Source: Horton Family, Noblesville, Indiana

Restoration by: magscanner