From Coop via boingboing.net:
"Folks (in the 1920s and 1930s) could mail-order bolt-on kits to change their old model T into a snowmobile! It was a pretty simple conversion, with an extra rear axle and treads in the back, and skis bolted on in place of the front wheels."
for discussion and pics:
http://www.winnipesaukee.com/forums/showthread.php?t=1507
a brief mention of U.S. Postal use:
http://www.arago.si.edu/index.asp?con=2&cmd=1&id=36905&img=1&pg=1
(note: this last site does not render well on firefox for OS X)
"Folks (in the 1920s and 1930s) could mail-order bolt-on kits to change their old model T into a snowmobile! It was a pretty simple conversion, with an extra rear axle and treads in the back, and skis bolted on in place of the front wheels."
for discussion and pics:
http://www.winnipesaukee.com/forums/showthread.php?t=1507
a brief mention of U.S. Postal use:
http://www.arago.si.edu/index.asp?con=2&cmd=1&id=36905&img=1&pg=1
(note: this last site does not render well on firefox for OS X)