September 18, 1819 - February 11, 1868
Foucault's Pendulum Google Videos
Leon Foucault celebrated in Google doodle The Guardian - September 18, 2013
Leon Foucault was a French physicist best known for the invention of the Foucault pendulum, a device demonstrating the effect of the Earth's rotation. He also made an early measurement of the speed of light, discovered eddy currents, and although he didn't invent it, is credited with naming the gyroscope. The Foucault crater on the Moon is named after him.
born and grow steadily; and it is not in one's power to either hasten or slow it down.
Leon Foucault - Foucault Pendulum