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Lucerne, Lake of

(Encyclopedia)Lucerne, Lake of, Ger. Vierwaldstätter See, irregular-shaped lake, 44 sq mi (114 sq km), central Switzerland. It has a maximum depth of c.700 ft (210 m). The lake is fed and drained by the Reuss Rive...

Euclid of Megara

(Encyclopedia)Euclid of Megara mĕgˈərə [key], c.450–c.375 b.c., Greek philosopher, a disciple of Socrates and traditional founder of the Megarian school. He combined the Eleatic doctrine of the unity of being...

Elizabeth of Valois

(Encyclopedia)Elizabeth of Valois vălˈwä, Fr. välwäˈ [key], 1545–68, queen of Spain, daughter of Henry II of France. Originally intended to wed Don Carlos, son of Philip II of Spain, she was married (1559) ...

Milic of Kremsier

(Encyclopedia)Milic of Kremsier mēˈlēch, krāmˈzēr [key], d. 1374, Bohemian reformer. He was a Roman Catholic priest. In 1363 he began a career of preaching in Moravia as well as in Prague. Believing that the ...

Eudoxus of Cnidus

(Encyclopedia)Eudoxus of Cnidus yo͞odŏkˈsəs, nīˈdəs [key], 408?–355? b.c., Greek astronomer, mathematician, and physician. From the accounts of various ancient writers, he appears to have studied with Plat...

Matthew of Paris

(Encyclopedia)Matthew of Paris or Matthew Paris, d. 1259, English historian, a monk of St. Albans. He became the historiographer of the convent after the death (c.1236) of Roger of Wendover. The first part of his C...

Adolf of Nassau

(Encyclopedia)Adolf of Nassau näˈsou [key], d. 1298, duke of Luxembourg, German king (1292–98). He owed his election to the ecclesiastical electors, who, fearing the growing power and ambition of the Hapsburgs,...

Paris, Treaty of

(Encyclopedia)Paris, Treaty of, any of several important treaties, signed at or near Paris, France. For the Treaty of Paris of 1856, see Paris, Congress of. For the Treaty of Paris of 1898, see Spanish-Americ...

polarization of light

(Encyclopedia)polarization of light, orientation of the vibration pattern of light waves in a singular plane. Unpolarized light can be converted into a single polarized beam by means of the Nicol prism, a device ...

Library of Congress

(Encyclopedia)Library of Congress, national library of the United States, Washington, D.C., est. 1800. It occcupies three buildings on Capitol Hill: The Thomas Jefferson Building (1897), the John Adams Building (19...