 He became a first-class member of the Académie des sciences in chemistry, on 20 November 1795, and subsequently elected vice-president of the class (1806) and then president (1807).In 1798 he married Claudine Picardet, a recently widowed friend and colleague.Under the Directory, he served on the Council of Five Hundred from 1797, elected from Ille-et-Vilaine, and was Treasury administrator of the Consulate in 1799.