Dort´mund, a city of Prussia, province of Westphalia, on the Emscher, 47 miles N.N.E. of Cologne, starting-point of an important canal to the lower Ems. It has rapidly increased in recent years, being the centre of important railway systems, having extensive coal-mines in the vicinity, and active manufactures of iron, steel, machinery, and railway plant. There are also a number of breweries, potteries, tobacco factories, and chemical works. It was once a free Imperial Hanseatic town, and the seat of the chief tribunal of the Vehme. Pop. 214,226.

Dory, or John Dory (Zeus faber), a bony fish which is the type of a special family (Zeidæ),

and is celebrated for the delicacy of its flesh. It seldom exceeds 18 inches in length, and is yellowish-green in colour with a blackish spot on each side, which, according to an old superstition, is the mark of St. Peter's forefinger and thumb; another claimant for this honour is the haddock. The dory is found on the Atlantic shores of Europe and in the Mediterranean. The name John Dory is supposed to be derived from the Fr. jaune dorée, golden yellow.

Dosith´eans, an ancient sect among the Samaritans, so called from their founder Dositheus, who was a contemporary and associate of Simon Magus, and lived in the first century of the Christian era. They rejected the authority of the prophets, believed in the divine inspiration of their founder, and had many superstitious practices.

Dosso Dossi, Giovanni di Lutero, Italian painter of the Ferrara school; born 1479, died 1542. He was much honoured by Duke Alfonso of Ferrara, and immortalized by Ariosto (whose portrait he executed in a masterly manner) in his Orlando. Modena, Ferrara, and Dresden possess most of his works. Circe in the Woods is in the Borghese Gallery, and St. Sebastian in the Brera at Milan.

Dost Mohammed Khan, born about 1790, a successful usurper who obtained possession of the throne of Afghanistan after the flight of Mahmud Shah in 1818. He ruled with very great ability, and although driven from his throne by a British army, was ultimately restored and became a steady supporter of British power in the East. He died in 1863.

Dostoiev´sky, Feodor Mikhailovitsh, a famous Russian novelist, born 1821, died 1881. After serving as an officer of engineers he devoted himself to literature, but becoming connected with the communistic schemes of Petrashevsky, he was condemned to death. At the last moment, when Dostoievsky was already on the scaffold, the sentence was commuted, and he was banished to the mines of Siberia. Pardoned by Alexander II, he returned in 1856 to resume his literary activity. His first novel, Poor People, came out in 1846. Among his works that have appeared in English are: Crime and Punishment; Injury and Insult; The Friend of the Family; The Gambler; The Idiot; Prison Life in Siberia; Uncle's Dream; The Permanent Husband; The Brothers Karamzov; Letters from the Underworld and Other Tales. There is a complete edition of his novels by C. Garnett, 1912.—Bibliography: J. A. T. Lloyd, A Great Russian Realist; J. M. Murray, F. Dostoievsky: a Critical Study.

Dot´terel (Eudromias morinellus), a species of plover which breeds in the north of Europe, and returns to the south for the winter. In Scotland it appears in April and leaves in August, the young being hatched in July, but comparatively few breed in the British Islands. It is found all over Europe and Northern Asia. The dotterel is about 8 inches long. Contrary to the general rule the hen is larger and more brightly coloured than the cock, and the latter performs most of the duties of incubation.

Douai (dö-ā), town, France, department of Nord, on the Scarpe, 18 miles south of Lille. It is one of the oldest towns in France, of which it became part by the Treaty of Utrecht. It is strongly fortified, has a fine town-house, several handsome churches, an academy of arts and law, a lyceum, museum and public library, Benedictine college, and hospital; a cannon foundry, linen manufactories, machine-works, and tanneries. There was long here a college for British Roman Catholic priests, the most celebrated of its kind, founded by Cardinal Allen in 1568. Douai was captured by the Germans during the European War, and retaken by the Allies in Oct., 1918. It received the Cross of the Legion of Honour in Sept., 1919. Pop. 36,314.