Uncommon A.L.S. "L. Foucault", 8vo. 1 page, Paris, February 24th 1855, to Monsieur Ami [Gilbert Govi], in French (translated): "Here is my take on the size one has to give the drawing; you could make it even smaller, but certainly not any larger. As you know, the engraver is more than willing to engrave on your marks, so I rely on your extreme kindness. All yours and leaving things in your camp, I remain..." Two very minor striations at the top left-hand margin, otherwise in fine condition.
French physicist who invented the Foucault Pendulum, made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope.
Condition: Very Good(+)