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National Radio Astronomy Observatory

(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

pigment

(Encyclopedia)pigment, substance that imparts color to other materials. In paint, the pigment is a powdered substance which, when mixed in the liquid vehicle, imparts color to a painted surface. The pigments used i...

Turner, Frederick Jackson

(Encyclopedia)Turner, Frederick Jackson, 1861–1932, American historian, b. Portage, Wis. He taught at the Univ. of Wisconsin from 1885 to 1910 except for a year spent in graduate study at Johns Hopkins. From 1910...

Morris, Richard Brandon

(Encyclopedia)Morris, Richard Brandon, 1904–89, American historian, b. New York City. He received his Ph.D. from Columbia in 1930, taught (1927–49) at the College of the City of New York, became a professor at ...

Baron, Salo Wittmayer

(Encyclopedia)Baron, Salo Wittmayer säˈlō vĭtˈmīər bärônˈ [key], 1895–1989, Jewish historian and educator, b. Galicia. He was taken as a child to Vienna, where he later studied at the university, earnin...

Oncken, Wilhelm

(Encyclopedia)Oncken, Wilhelm ôngˈkən [key], 1838–1905, German historian. He taught at the Univ. of Giessen after 1866. A typical national liberal of the 19th cent., Oncken regarded history as a means of nati...

Tyler, Moses Coit

(Encyclopedia)Tyler, Moses Coit, 1835–1900, American writer on intellectual history, b. Griswold, Conn. He moved to Michigan as a boy. Graduated from Yale (1857) and from Andover Theological Seminary, he entered ...

Robertson, William

(Encyclopedia)Robertson, William, 1721–93, Scottish churchman and historian. As moderator (1762–80) of the general assembly of the Church of Scotland, he led the moderate party and enforced the right of the sta...

Lovejoy, Arthur Oncken

(Encyclopedia)Lovejoy, Arthur Oncken, 1873–1962, American philosopher and intellectual historian, b. Germany, grad. Univ. of California, 1895, M.A. Harvard, 1897. He also studied at the Sorbonne before he began t...

Jurassic period

(Encyclopedia)Jurassic period jərăsˈĭk [key] [from the Jura Mts.], second period of the Mesozoic era of geologic time, lasting from 213 to 144 million years ago. At the start of the Jurassic most of the contine...