Harvest scene
Tractor and plow
Sod busting
CPR train loaded with threshing machines.
Typical early gas tractor
3060 Rumley tractor pulling six grain tanks.
Big 4 Tractor
Mogul tractor
Tractor and car in field
Breaking the sod
IHC Big Four tractor #2
Four men in overcoats standing on a tractor
Steam-Powered Tractor #1
Steam-Powered Tractor #2
Mechanical Engineering - Lab
