French musician; born at Nancy July 4, 1844; died at Paris June 3, 1886. He completed his musical education under Fétis, and was a prolific writer. His principal works are: "La Musique chez les Juifs," 1873; "Etude Historique sur la Poésie et la Musique dans la Cambrie" (with M. Lussy); "Histoire de la Notation Musicale Depuis Ses Origines" (1882); "La Vie et les Œuvres de J. S. Bach, Ses Elèves et Ses Contemporains: Mendelsohn-Bartholdi et Robert Schumann" (1886).