1827. In June 1828 he received priest's orders; in April end November of

the same year he took his degrees of B.D. and D.D., and in August entered on his new office. In one of the testimonials which accompanied his application to the trustees of Rugby, the writer stated it as his conviction that "if Mr Arnold were elected, he would change the face of education all through the public schools of England." This somewhat hazardous pledge was nobly redeemed. Under Arnold's superintendence the school became not merely a place where a certain amount of classical or general learning was to be obtained, but a sphere of intellectual, moral and religious discipline, where healthy characters were formed, and men were trained for the duties, and struggles and responsibilities of life. His energies were chiefly devoted to the business of the school; but he found time also for much literary work, as well as for an extensive correspondence. Five volumes of sermons, an edition of Thucydides, with English notes and dissertations, a History of Rome in three vols. 8vo, beside numerous articles in reviews, journals, newspapers and encyclopaedias, are extant to attest the untiring activity of his mind, and his patient diligence during this period. His interest also in public matters was incessant, especially ecclesiastical questions, and such as bore upon the social welfare and moral improvement of the masses. In 1841, after fourteen years at Rugby, Dr Arnold was appointed by Lord Melbourne, then prime minister, to the chair of modern history at Oxford. On the 2nd of December 1841 he delivered his inaugural lecture. Seven other lectures were delivered during the first three weeks of the Lent term of 1842. When the midsummer vacation arrived, he was preparing to set out with his family to Fox How in Westmoreland, where he had purchased some property and built a house. But he was suddenly attacked by angina pectoris, and died on Sunday, the 12th of June 1842. His remains were interred on the following Friday in the chancel of Rugby chapel, immediately under the communion table. The great peculiarity and charm of Dr Arnold's nature seemed to lie in the supremacy of the moral and the spiritual element over his whole being. He was not a notable scholar, and he had not much of what is usually called tact in his dealings either with the juvenile or the adult mind. What gave him his power, and secured for him so deeply the respect and veneration of his pupils and acquaintances, was the intensely religious character of his whole life. He seemed ever to act from a severe and lofty estimate of duty. To be just, honest and truthful, he ever held to be the first aim of his being. His _Life_ was written by Dean Stanley (1845). ARNOTT, NEIL (1788-1874), Scottish physician, was born at Arbroath on the 15th of May 1788. He studied medicine first at Aberdeen, and subsequently in London under Sir Everard Home (1756-1832), through whom he obtained, while yet in his nineteenth year, the appointment of full surgeon to an East Indiaman. After making two voyages to China he settled in 1811 to practise in London, and speedily acquired high reputation in his profession. Within a few years he was made physician to the French and Spanish embassies, and in 1837 he became a physician extraordinary to the queen. From his earliest youth Arnott had an intense love of natural philosophy, and to this was added an inventiveness which served him in good stead in his profession and yielded the "Arnott water-bed," the "Arnott ventilator," the "Arnott stove," &c. He was the author of several works bearing on physical science or its applications, the most important being his _Elements of Physics_ (1827), which went through six editions in his lifetime. In 1838 he published a treatise on _Warming and Ventilating_, and, in 1855, one on the _Smokeless Fireplace_. He was a strong advocate of scientific, as opposed to purely classical, education; and he manifested his interest in natural philosophy by the gift of L2000 to each of the four universities of Scotland and to the university of London, to promote its study in the experimental and practical form. He died in London on the 2nd of March 1874. ARNOULD-PLESSY, JEANNE SYLVANIE (1819-1897), French actress, was born in Metz on the 7th of September 1819, the daughter of a local actor named Plessy. She was a pupil of Samson at the Conservatoire in 1829, and made her _debut_ as Emma at the Comedie Francaise in 1834 in Alexandre Duval's _La Fille d'honneur_. She had an immense success, and Mlle Mars, to whom the public already compared her, took her up. Until 1845 she had prominent parts in all the plays, new and old, at the Theatre Francais, when suddenly at the height of her success, she left Paris and went to London, marrying the dramatic author, J.F. Arnould (d. 1854), a man much older than herself. The Comedie Francaise, after having tried in vain to bring her back, brought a suit against her, and obtained heavy damages. In the meantime Madame Arnould-Plessy accepted an engagement at the French theatre at St Petersburg, where she played for nine years. In 1855 she returned to Paris and was re-admitted to the Comedie Francaise, as _pensionnaire_ with an engagement for eight years. This second part of her career was even more brilliant than the first. She revived some of her old roles, but began to abandon the _jeunes premieres_ for the "lead," in which she had a success unequalled since the retirement of Mlle Mars. Her later triumphs were especially associated with new plays by Emile Augier, _Le Fils de Giboyer_ and _Maitre Guerin_. Her last appearance was in Edouard Cadol's _La Grand-maman_; she retired in 1876, and died in 1897. ARNSBERG, a town of Germany, in the Prussian province of Westphalia, romantically situated on an eminence almost surrounded by the river Ruhr, 44 m. S.E. of Munster and 58 m. E.N.E. of Dusseldorf by rail. Pop. (1900) 8490. It is the seat of the provincial authorities, and has three churches, a court of appeal, a Roman Catholic gymnasium, which was formerly the Benedictine abbey of Weddinghausen, a library, a normal school and a chamber of commerce. Weaving, brewing and distilling are carried on, and there are manufactories of white lead, shot and paper, works for the production of railway plant, and saw-mills. Near the town are the ruins of the castle of the counts of Arnsberg, the last of whom, Gottfried, sold his countship, in 1368, to the archbishop of Cologne. The countship was incorporated by the archbishops in their duchy of Westphalia, which in 1802 was assigned to Hesse-Darmstadt and in 1815 to Prussia. The town, which had received its first charter in 1237 and later joined the Hanseatic League, became the capital of the duchy. ARNSTADT, a town in the principality of Schwarzburg-Sondershausen, Germany, on the river Gera, 11 m. S. of Erfurt, with which it is connected by rail. Pop. (1900) 14,413. There are five churches, four Protestant and one Catholic. The Evangelical Liebfrauenkirche, a Romanesque building (mainly 12th-century), has two octagonal towers and a 10th-century porch. The palace contains collections of pictures and porcelain, and attached to it is a magnificent tower, all that remains of the castle built in 1560. The town hall dates from 1561. The industries of Arnstadt include iron and other metal founding, the manufacture of leather, cloth, tobacco, weighing-machines, paper, playing-cards, chairs, gloves, shoes, iron safes, and beer, and market-gardening and trade in grain and wood are carried on. There are copper-mines in the neighbourhood, as well as tepid saline springs, the waters of which are used for bathing, and are much frequented in summer. Arnstadt dates back to the 8th century. It was bought in 1306 by the counts of Schwarzburg, who lived here till 1716. ARNSWALDE, a town of Germany, in the kingdom of Prussia, in a marshy district between four lakes, 20 m. S.W. of Stargard and on the main line between that place and Posen. Besides the Gothic church there are no noteworthy public buildings. Its industries include iron founding, machinery, and manufactures of cloth, matches and starch. Pop. (1900) 8665. ARNULF (c. 850-899), Roman emperor, illegitimate son of Carloman, king of Bavaria and Italy, was made margrave of Carinthia about 876, and on his father's death in 880 his dignity and possessions were confirmed by the new king of the east Franks, Louis III. The failure of legitimate male issue of the later Carolingians gave Arnulf a more important position than otherwise he would have occupied; but he did homage to the emperor Charles the Fat in 882, and spent the next few years in constant warfare with the Slavs and the Northmen. In 887, however, Arnulf identified himself with the disgust felt by the Bavarians and others at the incapacity of Charles the Fat. Gathering a large army, he marched to Tribur; Charles abdicated and the Germans recognized Arnulf as their king, a proceeding which L. von Ranke describes as "the first independent action of the German secular world." Arnulf's real authority did not extend far beyond the confines of Bavaria, and he contented himself with a nominal recognition of his supremacy by the kings who sprang up in various parts of the Empire. Having made peace with the Moravians, he gained a great and splendid victory over the Northmen near Louvain in October 891, and in spite of some opposition succeeded in establishing his illegitimate son, Zwentibold, as king of the district afterwards called Lorraine. Invited by Pope Formosus to deliver him from the power of Guido III., duke of Spoleto, who had been crowned emperor, Arnulf went to Italy in 894, but after storming Bergamo and receiving the homage of some of the nobles at Pavia, he was compelled by desertions from his army to return. The restoration of peace with the Moravians and the death of Guido prepared the way for a more successful expedition in 895 when Rome was stormed by his troops; and Arnulf was crowned emperor by Formosus in February 896. He then set out to establish his authority in Spoleto, but on the way was seized with paralysis. He returned to Bavaria, where he died on the 8th of December 899, and was buried at Regensburg. He left, by his wife Ota, a son Louis surnamed the Child. Arnulf possessed the qualities of a soldier, and was a loyal supporter of the church. See "Annales Fuldenses" in the _Monumenta Germaniae historica. Scriptores_, Band i. (Hanover and Berlin, 1826); E. Dummler, _Geschichte des ostfrankischen Reichs_ (Leipzig, 1887-1888); M.J.L. de Gagern, _Arnulfi imperatoris vita_ (Bonn, 1837); E. Dummler, _De Arnulfo Francorum rege_ (Berlin, 1852); W.B. Wenck, _Die Erhebung Arnulfs und der Zerfall des karolingischen Reiches_ (Leipzig, 1852); O. Dietrich, _Beitrage zur Geschichte Arnolfs von Karnthen und Ludwigs des Kindes_ (Berlin, 1890); E. Muhlbacher, _Die Regesten des Kaiserreichs unter den Karolingern_ (Innsbruck, 1881). AROIDEAE (Arum family), a large and wide-spread botanical order of Monocotyledons containing about 1000 species in 105 genera. It is generally distributed in temperate and tropical regions, but especially developed in warm countries. The common British representative of the order, _Arum maculatum_ (cuckoo-pint, lords and ladies, or wake robin), gives a meagre idea of its development. The plants are generally herbaceous, often, however, reaching a gigantic size, but are sometimes shrubby, as in _Pothos_, a genus of shrubby climbing plants, chiefly Malayan. _Monstera_ is a tropical American genus of climbing shrubs, with large often much-perforated leaves; the fruiting spikes of a Mexican species, _M. deliciosa_, are eaten. The roots of the climbing species are of interest in their adaptation to the mode of life of the plant. For instance, some species of _Philodendron_ have a growth like that of ivy, with feeding roots penetrating the soil and clasping roots which fix the plant to its support. In other species of the genus the seed germinates on a branch, and the seedling produces clasping roots, and roots which grow downwards hanging like stout cords, and ultimately reaching the ground. The leaves, which show great variety in size and form, are generally broad and net-veined, but in sweet-flag (_Acorus Calamus_) are long and narrow with parallel veins. In _Arum_ the blade is simple, as also in the so-called arum-lily (_Richardia_), a South African species common in Britain as a greenhouse plant, and in _Caladium_, a tropical South American genus, and _Alocasia_ (tropical Asia), species of which are favourite warm-greenhouse plants on account of their variegated leaves. In other genera the leaves are much divided and sometimes very large; those of _Dracontium_ (tropical America) may be 15 ft. high, with a long stem-like stalk and a much-branched spreading blade. The East Indian genus _Amorphophallus_ has a similar habit. A good series of tropical aroids is to be seen in the aroid house at Kew. The so-called water cabbage (_Pistia Stratiotes_) is a floating plant widely distributed in the tropics, and consisting of rosettes of broadish leaves several inches across and a tuft of roots hanging in the water. [Illustration: _Arum maculatum_, Cuckoo-pint.