This is a rare video of an invention that never went very far.
Wait until you see the automobile version it is all on here.
1926 Snow Tractor. Talk about ingenuity!
This is a 1926 silent film (on video) of a tractor-snow-machine invented by Henry Ford, shown here driving it.

http://quipster.wordpress.com/2009/01/29/snow-motor-snowmobile-of-1926/