Adolph Bernhard Marx, a German composer, born in Halle, Nov. 27, 1799, died May 17, I860. He held a judicial office at Nuremberg, but subsequently devoted himself exclusively to the study of music. In 1823 he became editor of the Berliner allgemeine musikalische Zeitung, and in 1830 was appointed professor of music in the university of Berlin. His principal works are: Die Lehre von der musiha-luchen Composition (Leipsic, 1834-'45; 6th ed., 1863 et seq.; English translation by Saroni' New York, 1852); Allgemeine Musiklehre (1839; 7th ed., 1863); and Die Musih des 19. Jahrhunderts und ihre Pflege (1855). He wrote treatises on the "Art of Singing " (1826) "Painting in Music" (1828), etc., besides many articles in Schilling's Lexikon der Tonkunst. He is known as a composer by several musical dramas, symphonies, etc., and by his oratorio 'St. John the Baptist." lie also published Ludicig von Beethoven: Leben unci Scliaffen (Berlin, 1858; 2d ed., 1863); Oluck und die Oper (1802); and Denkwurdigkeiten aus mei-nem Leben (2 vols., 1865).