[Ruby], a gem which in value and hardness ranks next to the diamond; is dichroic, of greater specific gravity than any other gem, and belongs to the hexagonal system of crystals; is a pellucid, ruddy-tinted stone, and, like the sapphire, a variety of corundum, also found (but rarely) in violet, pink, and purple tints; the finest specimens come from Upper Burmah; these are the true Oriental rubies, and when above 5 carats exceed in value, weight for weight, diamonds; the Spinel ruby is the commoner jeweller's stone; is of much less value, specific gravity and hardness, non-dichroic, and forms a cubical crystal.
[Rückert, Friedrich], German poet, born at Schweinfurt, in Bavaria; at Würzburg University showed his talent for languages, and early devoted himself to philology and poetry; was for 15 years professor of Oriental Languages at Erlangen; introduced German readers, by excellent translations, to Eastern poetry; filled for some time the chair of Oriental Languages in Berlin; takes rank as a lyrist of no mean powers; essayed unsuccessfully dramatic composition (1788-1866).
[Ruddiman, Thomas], author of a well-known Latin grammar, a Banffshire man, and graduate of Aberdeen University; was school-mastering at Laurencekirk, where his scholarly attainments won him an assistantship in the Advocates' Library, Edinburgh; spent a busy life in that; city in scholarly occupation, editing many learned works, the most notable being Buchanan's works and the "immaculate" edition of Livy; his famous Latin grammar was completed in 1732; in 1730 became principal keeper of the Advocates' Library (1674-1757).
[Rudolf I.], of the House of Hapsburg, founder of the Austrian dynasty; born, the son of a count, at Schloss Limburg (Breisgau); greatly increased his father's domain by marriage, inheritance, and conquest, becoming the most powerful prince in S. Germany; acquired a remarkable ascendency among the German princes, and was elevated to the imperial throne in 1273, and by friendly concessions to the Pope, Gregory IX., terminated the long struggle between the Church and the empire; shattered the opposition of Ottocar, king of Bohemia, and brought peace and order to Germany (1218-1291).
[Rudolf II.], German Emperor, son of Maximilian II., born at Vienna; became king of Hungary in 1573, and of Bohemia three years later; ascended the imperial throne in 1576; indolent and incapable, he left the empire to the care of worthless ministers; disorder and foreign invasion speedily followed; persecution inflamed the Protestants; by 1611 his brother Matthias, supported by other kinsmen, had wrested Hungary and Bohemia from him; had a taste for astrology and alchemy, and patronised Kepler and Tycho Brahé (1552-1612).
[Rudolf Lake], in British East Africa, close to the highlands of S. Ethiopia, practically an inland sea, being 160 m. long and 20 broad, and brackish in taste; discovered in 1888.
[Rudra], in the Hindu mythology the old deity of the storm, and father of the Marutz.
[Rugby] (11), a town in Warwickshire, at the junction of the Swift and the Avon, 83 m. NW. of London; an important railway centre and seat of a famous public school founded in 1567, of which [Dr. Arnold] (q. v.), and Archbishops Tait and Temple were famous head-masters, is one of the first public schools in England, and scholars number about 450.
[Ruge, Arnold], a German philosophical and political writer, born at Bergen (Rügen); showed a philosophic bent at Jena; was implicated in the political schemes of the [Burschenschaft] (q. v.), and was imprisoned for six years; taught for some years in Halle University, but got into trouble through the radical tone of his writings in the Halle Review (founded by himself and another), and went to Paris; was prominent during the political agitation of 1848, and subsequently sought refuge in London, where for a short time he acted in consort with Mazzini and others; retired to Brighton, and ultimately received a pension from the Prussian Government; his numerous plays, novels, translations, &c., including a lengthy autobiography, reveal a mind scarcely gifted enough to grasp firmly and deeply the complicated problems of sociology and politics; is characterised by Dr. Stirling as the "bold and brilliant Ruge"; began, he says, as an expounder of Hegel, and "finished off as translator into German of that 'hollow make-believe of windy conceit,' he calls it, Buckle's 'Civilisation in England'" (1802-1880).
[Rügen] (45), a deeply-indented island of Germany, in the Baltic, separated from the Pomeranian coast by a channel (Strela Sund) about a mile broad; the soil is fertile, and fishing is actively engaged in. Bergen (4) is the capital.