(JOHN CHRISTIAN GOTTLIEB), a very learned physician and professor of medicine, was born at Zeulenrode in Upper Saxony, in the year 1756. Having acquired the rudiments of his medical education under the tuition of his father, who was also a physician, he proceeded to Jena and to Gottingen, and studied under Baldinger and Heyne. On quitting the latter university, he established himself in practice at Stendal, the numerous manufactories of which place enabled him to contribute many important observations to the translation of Ramazzini's Treatise of the Diseases of Artificers, which he published in 1780-83. After practising here several years, he was appointed public Professor in ordinary of medicine, in the university of Altorf in Franconia, which office he continued to fill with great repute to the time of his death, which took place in 1801. All Dr Ackermann's works display great erudition. To the history of medicine he contributed many valuable articles; the disquisitions, in particular, on the lives and writings of Hippocrates, Galen, Theophrastus, Dioscorides, Areteus, and Rufus Ephesius, which he furnished to Harle's edition of Fabricius' Bibliotheca Graeca, are justly esteemed as masterpieces of critical research. As a practitioner he appears to have possessed no mean talents for observation; though he has been accused, and, Ackermann it must be acknowledged, not without reason, of betraying occasionally a predilection for antiquated hypotheses. Besides various translations of English, French, and Italian medical authors, which were published, for the most part, previously to his removal to Altorf, the following works have appeared under his name:—1. De Trismo, Commentatio Medico. Svo, 1775.—2. De Dysenteriae Antiquitatis liber bipartitus. Svo, 1777.—3. Ueber die Krankheiten der Gelehrten. Svo, 1777.—4. The Life of John Conrad Dippel, in German. Svo, 1781.—5. Parabulum Medicamentorum Scriptores Antiqui: Sexti Placiti Papryiensis de Medicamentis ex Animalibus; Lucii Apulei de Medicamentis ex Herbis, cum Notis. Svo, 1788.—6. H. D. Gaubii Institutiones Pathologicae Mediceae, cum Additamentis, J. C. G. A. Svo, 1787.—7. Regimen Sanitatis Salerni, c. Studii Medici Salernitani Historia Premissa. Svo, 1790.—8. Institutiones Historiae Medicinae. Svo, 1792.—9. Institutiones Therapiae Generalis. 2 tom. Svo, 1793-95.—10. Handbuch der Kriegsmeykunde. 2 tom. Svo, 1795.—11. Opuscula ad Historiam Medicinae pertinentia. Svo, 1797.—12. Bemerkungen über die Kenntnis und Kur einiger Krankheiten. Svo, 1794-1800.—13. Pathologische Praktische Abhandlung über die Blähungen, für Ärzte und Kranken bestimmt. Svo, 1800.