books.google.com - Until 1949, resurfacing an ice rink required a tractor-pulled shaver followed by three or four workers scooping away the shavings and then spraying and squeegeeing water. The process-including the refreezing-took more than an hour. That all changed when a tireless inventor by the name of Frank J. Zamboni,...http://books.google.com/books/about/Zamboni.html?id=hBgtt5_fpdkC&utm_source=gb-gplus-shareZamboni
