French Catalan mathematician, physicist, astronomer, and politician (1786-1853). ANS in French, signed “F. Arago,” one page, 7 x 4.25, March 27, 1827. Untranslated note boldly signed at the conclusion by Arago. Central vertical fold, several pencil notations to top, and show-through from unrelated notations on reverse, otherwise fine condition. RR Auction COA.
