They were powered with steam originally.
Because when they were invented they were steam powered. Details (which were VERY easy to find) here:<br />
If anythong will go wring, it will....
Are you joking? Oh my GOD - the youth of today!!!!!
I don't know - ever hear of fun answers too my dear?!!! :-D
The original steam rollers were built like locomotives and ran on steam as well as heating the roller. Today the run on petro fuel which also heats the roller.