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Ibn al-Haytham

(Encyclopedia)Ibn al-Haytham ălhəzĕnˈ [key], 965–c.1040, Arab mathematician. Ibn al-Haytham was born in Basra, but made his career in Cairo, where he supported himself copying scientific manuscripts. Among hi...

Sylvester II

(Encyclopedia)Sylvester II, c.945–1003, pope (999–1003), a Frenchman (b. Auvergne) named Gerbert; successor of Gregory V. In his youth he studied at Muslim schools in Spain and became learned in mathematics and...

Nuuk

(Encyclopedia)Nuuk gôtˈhôp [key], town (1996 pop. 12,882), Nuuk dist., W Greenland, on the Godthåbfjord. The largest town and capital of Greenland, it is the seat of the national council and of the supreme cour...

Lerner, Alan Jay

(Encyclopedia)Lerner, Alan Jay, 1918–86, American lyricist and librettist, b. New York City. After two years as a radio scriptwriter, Lerner began an association with the composer Frederick Loewe that resulted in...

music hall

(Encyclopedia)music hall. In England, the Licensing Act of 1737 confined the production of legitimate plays to the two royal theaters—Drury Lane and Covent Garden; the demands for entertainment of the rising lowe...

Marriner, Sir Neville

(Encyclopedia)Marriner, Sir Neville, 1924–2016, British conductor, b. Lincoln, England, grad. Royal College of Music, London (1946), studied Paris Conservatory. A violinist, he taught at the Royal College (1949�...

Ripley, Robert LeRoy

(Encyclopedia)Ripley, Robert LeRoy, 1890–1949, American cartoonist, b. Santa Rosa, Calif., as Leroy Robert Ripley. The creator of the Believe It or Not! newspaper cartoon, Ripley began his career at 16 as a sport...

virtual observatory

(Encyclopedia)virtual observatory, a collection of integrated astronomical data archives and software tools that utilize computer networks to create an environment in which research can be conducted. Several countr...

Trudeau, Justin Pierre James

(Encyclopedia)Trudeau, Justin Pierre James tro͞odōˈ [key], 1971–, Canadian politician, b. Ottawa; grad. McGill Univ. (B.A., 1994), Univ. of British Columbia (B.Ed., 1998), son of Pierre Trudeau. He briefly tau...

potentiometer

(Encyclopedia)potentiometer. 1 Manually adjustable, variable, electrical resistor. It has a resistance element that is attached to the circuit by three contacts, or terminals. The ends of the resistance element are...