 In 1766 he succeeded Sauvages de Lacroix at the Faculty of Medicine, and in 1793 became a foreign member of the Linnean Society of London.During his career he maintained correspondence with several learned scientists and thinkers, which included in addition to Linnaeus; Albrecht von Haller (1708–1777), Jean Guillaume Bruguière (1750–1798), Jean-Jacques Rousseau (1712–1778), Carl Peter Thunberg (1743–1828), et al.In 1790, he was elected a foreign member of the Royal Swedish Academy of Sciences.