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Nat. Biog. IMG:content-0056.png:[blocks in formation] Allen, Carl Ferdinand Allectus (a-lek'tus). The prime minister of Car a us i us, "emperor" of Britain, and his murderer (293 A. D.). Allectus usurped the throne of Car a us i us and retained it for three years, but was defeated and slain by the Romans under a lieutenant of Constant i us near London. Allée Blanche (äl-la' blonsh). [F., 'White Walk.'] An Alpine valley south of Mont Blanc. Allée Verte (äl-la' vert). [F., 'Green Walk.'] A double avenue of limes beginning at the western end of the Boulevard d'Anvers in Bru els and extending along the bank of the Willebroeck Canal. It was formerly a fashionable promenade. Alleghany (al'e-ga-ni) Mountains. A name given sometimes to the Appal a chi an Mountains (see Appal a chi an ), and sometimes to that part of this system which lies west and south of the Hudson; but usually applied, in a restricted sense, to the chain which in Pennsylvania lies east of the Laurel Hill range. This chain cro es the western extremity of Maryland, traverses West Virginia, and forms part of the boundary between Virginia and West Virginia. Also the Alleghanies . Alleghany River. See Allegheny . Allegheny (al'e-gen-i), or Allegheny City. A city in Allegheny County, Pennsylvania, situated on the Allegheny River opposite Pittsburg. It is an important railroad center, has extensive manufactures, and is the seat of a Presbyterian and other theological seminaries. Population (1890), 105,287. Allegheny, or Alleghany, River. The chief head stream of the Ohio River. It rises in Potter County, Pennsylvania, flows through Cat tar aug us County, New York, reënters Pennsylvania, flows southwest, and unites with the Monongahela at Pittsburg to form the Ohio. Its chief tributaries are French Creek, the Clarion, and the Conemaugh. Its length is about 350 miles, and it is navigable about 200 miles. Allegheny College. An institution of learning at Meadville, Pennsylvania, incorporated in 1817. It is under the control of the Methodist Episcopal Church. Allegri, Antonio. See Correggio . Allegri (äl-lā'grē), Gregorio. Born at Rome about 1580: died at Rome, Feb. 18, 1652. An Italian composer. His name is most commonly a ociated with a "Miserere" for nine voices in two choirs, which is, or was till lately, sung annually in the Pontifical Chapel during the Holy Week, and is held to be one of the most beautiful compositions which have ever been dedicated to the service of the Roman Church. There was a time when it was so much treasured that to copy it was a crime visited with excommunication. Not that its po e ion was even thus confined to the Sistine Chapel. Dr. Burney got a copy of it. Mozart took down the notes while the choir were singing it, and Choron, the French man, managed to insert it in his "Collection" of pieces used in Rome during the Holy Week. Leopold I., a great lover of music, sent his amba ador to the Pope with a formal request for a copy of it, which was granted to him.