Johann Gottlieb, a German composer, born at Blasewitz, near Dresden, April 17, 1741. died in Dresden, Oct. 23, 1801. When 13 years of age he went to Italy, and afterward settled in Venice, where he remained eight years, teaching and composing music. In 1765 lie returned to Dresden, and was appointed composer to the elector of Saxony. Shortly after he made a second journey to Italy, and in 1772 a third, when he resided two years at Rome, and in 13 months composed five operas. In his later years he composed much church music. Among his operas are "Cora," "Am-phion," "Orpheus," and "Gustavus Vasa."
Karl Friedrieh, a German mineralogist, son of the preceding, born in Dresden, May 30, 1797, died in Leipsic in January, 1874. He was educated at Freiberg, Leipsic, and Jena, made a scientific journey to Norway in 1821 and 1822, and published Beitrage zur Kennt-niss Norwegens (2 vols., Leipsic, 1824). In 1826 he succeeded Mohs in the chair of crystallography at Freiberg, and in 1835 was also appointed professor of geognosy. In 1842 he went to the university of Leipsic as professor of mineralogy and geognosy, and in 1866 he was made privy counsellor of mines. Among his remaining works are: Anfangsgrunde der Krystallographie (Dresden, 1841; 2ded., 3 vols., Leipsic, 1854); Elemente der Mineralogie (8th ed., 1871); and Lehrbuch der Geognosie (1850; 2d ed., 3 vols., 1858-'67).
Moritz Ernst Adolf, a German physician, brother of the preceding, born in Dresden, Oct. 6, 1798, died in Bonn, Oct. 19, 1871. He took his degree at Leipsic, and was adjunct professor there in 1824-'5, and subsequently in Berlin till 1828, when he became professor at Bonn. Among his works are: Handouch der medicinischen Klinik (8 vols., Berlin, 1829-'39; 2d ed., 11 vols., 1839-'47); Pathogenie (3 vols., 1841 - '5); Allgemeine Pathologic und Therapie (1851); Ergebnisse und Studien aus der medicinischen Klinik zu Bonn (2 vols., Leipsic, 1858-'61); and Die Naturwis-senschaften und der Materialismus (Bonn, 1869).
Emil, a German composer and author, son of the preceding, born in Berlin, Sept. 8, 1828. He studied under Mendelssohn, and in 1848 produced bis first important work, the oratorio Christus der Friedensoote. About 1852 he published Die Umgestaltung der protestantischen KirchenmusiTc, and was soon after appointed director of church music at Berlin. Among his compositions are the cantata Zerstorung Jerusalem's, the operas Judith and Muhlenhexe, the overture to Lorelei, and many pieces of church music. He has published Ueber die Einfuhrung des Psalmengesanges in der evan-gelischen Kirche (1856), and Die Tonlcumt in der Culturgeschichte (1869-'70).