Autograph Letter Signed, to Pierre Grand in Paris, concerning a doctor who needs an assistant to make random medical visits to young people. In French. 1 page 7 x 4 inches, fine, with the address leaf. Printed heading of La Bibliotheque Physico-Economique. Paris, 8 July 1829. Jean Sébastien Eugène Julia de Fontenelle (1790-1842), French chemist, author of Manuel complet des fabricants de chapeaux en tous genres.