So this was kind of awesome! We were JUST talking about you, long-departed Leon Foucault, and Google (which would blow your 19th century mind) decided to celebrate your famous demonstration device with an official Doodle. By the way, I apologize for the misnomer our textbook stuck you with. Jean was your first name, true, but it seems your papa Foucault was called Jean whilst you preferred Leon. You were a very busy guy, calculating the rough speed of light and naming the gyroscope. You died fairly young, at 48. I wonder what you would have accomplished had you lived a bit longer? Great thinking!
http://www.washingtonpost.com/blogs/comic-riffs/post/leon-foucault-many-happy-returns--googles-interactive-pendulum-doodle-celebrates-french-physicist/2013/09/18/4ab91736-2013-11e3-94a2-6c66b668ea55_blog.htm
