[Sidmouth, Henry Addington, Viscount], statesman, born in London, the son of a physician; studied at Oxford, and was called to the bar, but gave up law for politics, entered Parliament in 1783, and was Speaker from 1789 till 1801, in which year, after the fall of Pitt over Catholic emancipation, he formed a ministry, assuming himself the offices of First Lord of the Treasury and Chancellor of the Exchequer. This ministry of the "King's Friends" went out of office in 1804, after negotiating the Peace of Amiens (1802), and in subsequent governments of Pitt Sidmouth held various offices, being an unpopular Home Secretary from 1812 to 1821; created viscount in 1805 (1757-1844).
[Sidney] or Sydney, Algernon, a noted politician and soldier of extreme republican views, second son of Robert, second Earl of Leicester; first came into public notice in 1641-1642 by his gallant conduct as leader of a troop of horse in the Irish Rebellion; came over to England in 1643, joined the Parliamentarians, rose to a colonelcy and command of a regiment in 1645; was subsequently governor of Dublin and of Dover (1647), entered Parliament (1646), and although appointed one of the commissioners to try Charles I., absented himself from the proceedings, but afterwards approved of the execution; withdrew from politics during Cromwell's Protectorate, but on the reinstating of the Long Parliament (1659) became a member of the Council of State; was on a diplomatic mission to Denmark when the Restoration took place, and till his pardon in 1677 led a wandering life on the Continent; intrigued with Louis XIV. against Charles II., assisted William Penn in drawing up the republican constitution of Pennsylvania, was on trumped-up evidence tried for complicity in the Rye House Plot and summarily sentenced to death by Judge Jeffreys, the injustice of his execution being evidenced by the reversal of his attainder in 1689 (1622-1683).
[Sidney, Sir Philip], poet, and one of the most attractive figures at Elizabeth's court, born at Penshurst, Kent, the son of Sir Henry Sidney, lord-deputy of Ireland; quitted Oxford in 1572, and in the manner of the time finished his education by a period of Continental travel, from which he returned imbued with the love of Italian literature; took his place at once in the court of Elizabeth, his uncle, the Earl of Leicester, being then high in favour, and received rapid promotion, being sent as ambassador in 1576 to the court of Vienna; nor was his favour with the queen impaired by his bold "Remonstrance" against her marriage with the Duke of Anjou, and in 1583 received a knighthood; two years later, "lest she should lose the jewel of her dominions" the queen forbade him to accompany Drake to the West Indies, and appointed him governor of Flushing, but in the following year he received his death-wound at the battle of Zutphen gallantly leading a troop of Netherlander against the Spaniards; his fame as an author rests securely on his euphuistic prose romance "Arcadia," his critical treatise "The Defence of Poesy," and above all on his exquisite sonnet-series "Astrophel and Stella," in which he sings the story of his hapless love for Penelope Devereux, who married Lord Rich; was the friend of Edmund Spenser, and the centre of an influential literary circle (1554-1586).
[Sidon], an ancient Phoenician city on the E. of the Mediterranean, 20 m. N. of Tyre, with an extensive commerce; was famed for its glass and purple dye; also suffered many a reverse of fortune.
[Siebengebirge], a range of hills on the right bank of the Rhine, 20 m. above Köln, distinguished by its seven high peaks.
[Siegfried], a hero of various Scandinavian and Teutonic legends, and especially of the ["Nibelungen Lied"] (q. v.), was rendered invulnerable by bathing in the blood of a dragon which he had slain, except at a spot on his body which had been covered by a falling leaf; he wore a cloak which rendered him invisible, and wielded a miraculous sword named [Balmung] (q. v.).
[Siemens, Werner von], a celebrated German electrician and inventor, born at Lenthe, Hanover; served in the Prussian artillery, and rendered valuable services in developing the telegraphic system of Prussia; patented a process for electro-plating in gold and silver, and was the first to employ electricity in exploding submarine mines; retired from the army in 1849, and along with Halske established a business in Berlin for telegraphic and electrical apparatus, which has become notable throughout the world, having branches in several cities; made many contributions to electrical science; was ennobled in 1888 (1816-1892).
[Siemens, Sir William] (Karl William), younger brother of the preceding, born at Lenthe, Hanover; like his brother took to science, and in 1844 settled in England, naturalising in 1859; was manager of the English branch of the Siemens Brothers firm, and did much to develop electric lighting and traction (Portrush Electric Tramway); his inventive genius was productive of a heat-economising furnace, a water-meter, pyrometer, bathometer, &c.; took an active part in various scientific societies; was President of the British Association (1882), and received a knighthood in 1883 (1823-1883).
[Sienna] or Siena (28), an interesting old Italian city of much importance during the Middle Ages, in Central Italy, 60 m. S. of Florence, is still surrounded by its ancient wall, and contains several fine Gothic structures, notably its cathedral (13th century) and municipal palace; has a university and institute of fine arts; silk and cloth weaving, and a wine and oil trade are the chief industries.