Roman, > Surely American scientists > actually spell the elements correctly even if > aluminum siding salesmen can't?? I wouldn't bet on it. Aluminum is the "correct" spelling according to an American dictionary. I am sure American scientists and engineers simply use the spelling they were educated with. It's always intrigued me why the language had to be "simplified" :-) Sean -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.