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centering

(Encyclopedia)centering, the framework of wood or of wood and steel built to support a masonry arch or vault during its construction. The centering itself must be rigidly supported, either by posts from the ground ...

heartwood

(Encyclopedia)heartwood, the central, woody core of a tree, no longer serving for the conduction of water and dissolved minerals; heartwood is usually denser and darker in color than the outer sapwood. Before the s...

Fort McMurray

(Encyclopedia)Fort McMurray, former city, now part of the regional municipality of Wood Buffalo, NE Alta., Canada. Originally a fur-trading post on the Athabasca and Clearwater rivers, Fort McMurray was a town of 1...

carding

(Encyclopedia)carding, process by which fibers are opened, cleaned, and straightened in preparation for spinning. The fingers were first used, then a tool of wood or bone shaped like a hand, then two flat pieces of...

Duhem, Pierre Maurice Marie

(Encyclopedia)Duhem, Pierre Maurice Marie pyĕr mōrēsˈ märēˈ düĕmˈ [key], 1861–1916, French physicist and philosopher and historian of science. After studying at the École Normale Supérieure he taught ...

Emmet, Robert

(Encyclopedia)Emmet, Robert, 1778–1803, Irish nationalist and revolutionary. He studied at Trinity College, Dublin, but left in 1798 because of his nationalist sympathies. In 1800 he went to France, where with ex...

Gilder, Richard Watson

(Encyclopedia)Gilder, Richard Watson gĭlˈdər [key], 1844–1909, American editor and poet, b. Bordentown, N.J. In 1869 he became an editor of the magazine Hours at Home, which merged with Scribner's Monthly in 1...

National Symphony Orchestra

(Encyclopedia)National Symphony Orchestra (NSO), Washington, D.C., founded in 1931 by Hans Kindler, who conducted the orchestra until 1949. Its first home was Constitution Hall; since 1986 it has been affiliated wi...

Limoges

(Encyclopedia)Limoges lēmôzhˈ [key], city (1990 pop. 136,407), capital of Haute-Vienne dept., W central France, on the Vienne River. It is famous for its ceramics industry, which uses the abundant kaolin in the ...

Vincent de Paul, Saint

(Encyclopedia)Vincent de Paul, Saint, 1580?–1660, French priest renowned for charitable work, b. Gascony. He was ordained in 1600. There are conflicting stories about his capture by pirates and enslavement in Tun...