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Poulsen, Valdemar

(Encyclopedia)Poulsen, Valdemar välˈdəmär poulˈsən [key], 1869–1942, Danish electrical engineer. He invented (1898) the telegraphone (an early wire recorder) and the high-frequency Poulsen arc used in wirel...

Clairaut, Alexis Claude

(Encyclopedia)Clairaut, Alexis Claude älĕksĕsˈ klōd klĕrōˈ [key], 1713–65, French mathematician. He assisted P. L. M. de Maupertuis in measuring (1736) a degree of an arc of a meridian in Lapland. He is n...

La Condamine, Charles Marie de

(Encyclopedia)La Condamine, Charles Marie de shärl märēˈ də lä kôNdämēnˈ [key], 1701–74, French traveler and mathematical geographer. He was one of a group sent to Peru in 1735 to measure the length of ...

Étex, Antoine

(Encyclopedia)Étex, Antoine äNtwänˈ ātĕksˈ [key], 1808–88, French sculptor, painter, and architect. A pupil of Ingres, he is best known as a sculptor. Among his works are two large groups, Resistance and P...

Kizil Irmak

(Encyclopedia)Kizil Irmak kəzŭlˈ ərmäkˈ [key], anc. Halys, longest river of Turkey, c.715 mi (1,150 km) long, rising in the Kizil Dağ, N central Turkey, and flowing in a wide arc SW, then N, and then NE into...

Champs Élysées

(Encyclopedia)Champs Élysées shäN zālēzāˈ [key], avenue of Paris, France, leading from the Place de la Concorde to the Arc de Triomphe. It is celebrated for its tree-lined beauty, its commodious breadth, the...

Porcupine, river, Canada

(Encyclopedia)Porcupine pôrˈkyəpīnˌ [key], river, 448 mi (721 km) long, rising in the Ogilvie Mts., NW Yukon, Canada. It flows in a great arc NE through the Eagle Plain, then W into Alaska and to the Yukon Riv...

Cornell, Katharine

(Encyclopedia)Cornell, Katharine, 1898–1974, American actress, b. Berlin. Cornell made her debut in 1916 with the Washington Square Players. In 1921 she married Guthrie McClintic, a producer-director. From their ...

ornament, in architecture

(Encyclopedia)ornament, in architecture, decorative detail enhancing structures. Structural ornament, an integral part of the framework, includes the shaping and placement of the buttress, cornice, molding, ceiling...

Serra, Richard

(Encyclopedia)Serra, Richard, 1939–, American sculptor, b. San Francisco; grad. Univ. of California, Santa Barbara (B.A., 1961), Yale (B.F.A., M.F.A., 1974). Many of his early works (1960s) are cast in rubber or ...