Charles Julius Hempel, an American physi-cian, born in Solingen, Prussia, Sept. 5, 1811. He studied medicine in Paris, and in 1835 emigrated to the United States, where he has since resided. He graduated at the university of New York, and practised medicine in that city according to the system of Hahnemann. In 1857 he was appointed professor of materia medica and therapeutics in the homoeopathic medical college of Pennsylvania, at Philadelphia. He has published "A Grammar of the German Language" (1842); "True Organization of the New Church" (1848); and translations of Hahnemann's Materia Medica Pura (4 vols. 8vo, 1846), of Jahr and Possart's "New Manual of the Homoeopathic Materia Medica" (1849), and of Jahr's "New Manual" (2 vols.), to which a third volume was added by Dr. Hempel as a separate work, under the title of "Complete Repertory of Homoeopathic Materia Medica" (1853). He has also published " A Comprehensive System of Homoeopathic Materia Medica and Therapeutics" (1859), " Homoeopathic Theory and Practice, with the Homoeopathic Treatment of Surgical Diseases," with Dr. I. Beakley (1865), and "The Science of Homoeopathy" (1874).