ACKERMANN, JOFIN CHRISTIAN GOTTLIEB, a learned physician and professor of medicine, born at .Zeulenroda, in Upper Saxony, in 1756. At the early age of fifteen he became a student of medicine at Jena, -where he soon attracted the favourable notice of Baldinger, who undertook the direction of his studies. -When Baldinger was transferred to Gottingen in 1773, Ackermann went with him, and afterwards studied for two years at Halle. A few years' practice at Stendal (1778-99), where there were numerous factories, enabled him to add many valuable original observations • to his translation of Ramazzini's Treatise of the Diseases of Artificers (1780-83). In 1786 he became professor of medicine at the university of Altorf, in Franconia, occupying first the chair of chemistry, and then, from 1794 till his death in 1801, that of pathology and therapeutics. Dr Ackermann's knowledge of the history of medicine may be estimated by his valuable contributions to Harless's edition of Fabricius' Bibliotheca Grceca. He wrote numerous original works, besides translations.