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British Library

(Encyclopedia)British Library, national library of Great Britain, located in London; one of the world's great libraries. Long a part of the British Museum, the library collection originated in 1753 when the governm...

Amsterdam, city, Netherlands

(Encyclopedia)Amsterdam ămˈstərdămˌ, Dutch ämstərdämˈ [key], city (2021 pop. 1,157,519), constitutional capital and largest city of the Kingdom of the Netherlands, Nort...

Foster, Norman Robert, Baron Foster of Thames Bank

(Encyclopedia)Foster, Norman Robert, Baron Foster of Thames Bank, 1935–, British architect, b. Manchester, grad. Manchester Univ. school of architecture (1961), Yale school of architecture (M.A., 1962). Foster an...

performance art

(Encyclopedia)performance art, multimedia art form originating in the 1970s in which performance is the dominant mode of expression. Perfomance art may incorporate such elements as instrumental or electronic music,...

ring, piece of jewelry

(Encyclopedia)ring, small ornamental hoop usually worn on finger or thumb, but it may be attached to the ear or the nose. Finger rings made of bronze, gold, and silver from the period c.2600–1500 b.c. have been f...

Nadir Shah

(Encyclopedia)Nadir Shah or Nader Shah both: näˈdēr shä [key], 1688–1747, shah of Iran (1736–47), sometimes considered the last of the great Asian conquerors. He was a member of the Afshar tribe. Although t...

tungsten

(Encyclopedia)tungsten tŭngˈstən [key] [Swed.,=heavy stone], metallic chemical element; symbol W; at. no. 74; at. wt. 183.84; m.p. about 3,410℃; b.p. 5,660℃; sp. gr. 19.3 at 20℃; valence +2, +3, +4, +5, or...

Quebec, city, Canada

(Encyclopedia)Quebec, Fr. Québec, city (1991 pop. 167,517), provincial capital, S Que., Canada, at the confluence of the St. Lawrence and St. Charles rivers. The population is largely French speaking, and the town...

boron

(Encyclopedia)boron bōrˈŏn [key] [New Gr. from borax], chemical element; symbol B; at. no. 5; interval in which at. wt. ranges 10.806–10.821; m.p. about 2,300℃; sublimation point about 2,550℃; sp. gr. 2.3 ...

silicon

(Encyclopedia)silicon, nonmetallic chemical element; symbol Si; at. no. 14; interval in which at. wt. ranges 28.084–28.086; m.p. 1,410℃; b.p. 2,355℃; sp. gr. 2.33 at 25℃; valence usually +4. Silicon is the ...