Ar´nold, Thomas, headmaster of Rugby School, and professor of modern history in the University of Oxford, born at Cowes, in the Isle of Wight, in 1795, died 1842. He entered Oxford in his sixteenth year, and in 1815 he was elected Fellow of Oriel College, and both in that year and 1817 he obtained the chancellor's prize for Latin and English essays. After taking deacon's orders he settled at Laleham, near Staines, where he employed himself in preparing young men for the universities. In 1828 he was appointed headmaster of Rugby School, and devoted himself to his new duties with the greatest ardour. While giving due prominence to the classics, he deprived them of their exclusiveness by introducing various other branches into his course, and he was particularly careful that the education which he furnished should be in the highest sense moral and Christian. His success was remarkable. Not only did Rugby School become crowded beyond any former precedent, but the superiority of Dr. Arnold's system became so generally recognized that it may be justly said to have done much for the general improvement of the public schools of England. In 1841 he was appointed professor of modern history at Oxford, and delivered his introductory course of lectures with great success. His chief works are his edition of Thucydides, his History of Rome (unhappily left unfinished), and his Sermons. There is an admirable memoir of him by A. P. Stanley, Dean of Westminster (London, 2 vols., 1845).—Cf Lytton Strachey, Eminent Victorians.

Ar´nold of Brescia, an Italian religious and political reformer and martyr of the twelfth century. He was one of the disciples of Abélard, and attracted a considerable following by preaching against the corruption of the clergy. Excommunicated by Innocent II, he withdrew to Zürich, but soon reappeared in Rome, where he was taken and burned (1155).

Arnold-Forster, Hugh Oakeley, grandson of

Dr. Arnold of Rugby, and adopted son of the late W. E. Forster, M.P., whose wife was his aunt, was born in 1855, died in 1909. He was educated at Rugby and University College, Oxford. He sat as member of Parliament for West Belfast from 1892, for Croydon from 1906, as a Liberal Unionist, was Parliamentary Secretary to the Admiralty from 1900 to 1903, then Secretary of State for War, a position which he held till Dec., 1905, having put forward sweeping proposals for the improvement of our army. He wrote on various subjects, especially books for popular instruction, including How to Solve the Irish Land Question, The Citizen Reader, This World of Ours, Things New and Old, In a Conning Tower, A History of England, English Socialism of To-day, Military Needs and Military Policy, &c.

Ar´non, a river in Palestine, the boundary between the country of the Moabites and that of the Amorites, afterwards of the Israelites, a tributary of the Dead Sea. It is now called Wady-el-Mojib.

Ar´not, or Ar´nut, a name of the agreeably flavoured farinaceous tubers of the earth-nut or pig-nut (Bunium flexuōsum and B. Bulbocastănum). See Earth-nut.

Ar´nott, Dr. Neil, an eminent physician and physicist, was born at Arbroath, 1788, died 1874. Having graduated as M.A. at Aberdeen, he then studied medicine, and was appointed a surgeon in the East India Company's naval service. In 1811 he commenced practice in London. In 1837 he was appointed extraordinary physician to the queen. In 1827 he published Elements of Physics, and in 1838 a treatise on Warming and Ventilation, &c. He is widely known as the inventor of a stove which is regarded as one of the most economical arrangements for burning fuel, a ventilating chimney-valve, and his water-bed for the protection of the sick against bed-sores. In 1869 he gave £1000 to each of the four Scottish universities and £2000 to London University for the promotion of the study of physics. He was a strong advocate of a scientific as opposed to a purely classical education.

Arnprior, a town of Canada, province Ontario, 35 miles west of Ottawa, on the right bank of the River Ottawa, where it is joined by the Madawaska, and with important railway connections. Pop. 4405.

Arnsberg (a˙rnz´berh), a town in Prussia, province Westphalia, capital of the district of same name, on the Ruhr. Pop. 10,256.—The district of Arnsberg has an area of 2972 sq. miles, and a population of 2,400,000.

Arnstadt (a˙rn´sta˙t), a town of Germany, in Schwarzburg-Sondershausen, 11 miles south by west of Erfurt, upon the Gera, which divides it into two parts. It has manufactures in leather, &c., and a good trade in grain and timber. Pop. 17,907.