Did anyone catch the special on the History Channel last night? It was very educational. So I thought, I wonder if the information that I like so much was on the Internet? Guess what.... I found it. Enjoy... The choices of 8 & 9 deal with currency and coins, but it is all interesting. The slider in the center of the screen.
http://www.history.com/minisite.do?...ini_id=52493Sorry they added commercials to it also, but the Upset milling process answer a big question in my mind.