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Clements, Frederic Edward

(Encyclopedia)Clements, Frederic Edward, 1874–1945, American plant ecologist and pioneer in the study of succession (see ecology), b. Lincoln, Nebr., grad. Univ. of Nebraska, 1894. From 1917 to 1941 he was in cha...

North Braddock

(Encyclopedia)North Braddock, borough (1990 pop. 7,036), Allegheny co., W Pa., a suburb of Pittsburgh, on the Monongahela River; inc. 1897. Andrew Carnegie's first steel plant was built there in 1875. The borough w...

Pittsburgh

(Encyclopedia)Pittsburgh pĭtsˈbərg [key], city (1990 pop. 369,879), seat of Allegheny co., SW Pa., at the confluence of the Allegheny and the Monongahela rivers, which there form the Ohio River; inc. 1816. A maj...

Bridges, Calvin Blackman

(Encyclopedia)Bridges, Calvin Blackman, 1889–1938, American geneticist, b. Schuyler Falls, N.Y., grad. Columbia (B.S., 1912; Ph.D., 1916). In his research he collaborated with T. H. Morgan, A. H. Sturtevant, and ...

Stern, Otto

(Encyclopedia)Stern, Otto stûrn, Ger. ôˈtō shtĕrn [key], 1888–1969, American physicist, b. Germany, Ph.D. Univ. of Breslau, 1912. After resigning from his post at the Univ. of Hamburg in 1933, he became prof...

Thwing, Charles Franklin

(Encyclopedia)Thwing, Charles Franklin twĭng [key], 1853–1937, American educator and Congregational clergyman, b. New Sharon, Maine, grad. Harvard, 1876, and Andover Theological Seminary, 1879. Until 1890 he ser...

Mount Wilson Observatory

(Encyclopedia)Mount Wilson Observatory, astronomical observatory located in California on Mt. Wilson, near Pasadena. Mt. Wilson Observatory was founded in 1904 by George E. Hale. Its equipment includes 100-in. (2.5...

Fackenthal, Frank Diehl

(Encyclopedia)Fackenthal, Frank Diehl făkˈənthôl [key], 1883–1968, American educator, b. Hellertown, Pa., grad. Columbia, 1906. He served Columbia as chief clerk (1906–10), secretary (1910–37), and provos...

Jameson, John Franklin

(Encyclopedia)Jameson, John Franklin, 1859–1937, American historian, b. Somerville, Mass. After teaching at Johns Hopkins, Brown, and the Univ. of Chicago he was director (1905–28) of the department of historic...

Lucas, Robert Emerson, Jr.

(Encyclopedia)Lucas, Robert Emerson, Jr., 1937–2023, American economist, b. Yakima, Wash., Ph.D. Univ. of Chicago, 1964. Lucas taught at Carnegie Mellon Univ. (1963...