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Lodge, Sir Oliver Joseph

(Encyclopedia)Lodge, Sir Oliver Joseph, 1851–1940, English physicist, grad. University College, London (B.S., 1875; D.Sc., 1877). He made valuable contributions to the development of wireless telegraphy and condu...

McKeesport

(Encyclopedia)McKeesport məkēzˈpôrt [key], city (1990 pop. 26,016), Allegheny co., SW Pa., in hilly terrain at the confluence of the Monongahela and Youghiogheny rivers; settled 1755, inc. as a city 1890. An in...

bluestone

(Encyclopedia)bluestone, common name for the blue, crystalline heptahydrate of cupric sulfate called chalcanthite, a minor ore of copper. It also refers to a fine-grained, light to dark colored blue-gray sandstone....

Delaware, river, United States

(Encyclopedia)Delaware dĕlˈəwâr, –wər [key], river, c.280 mi (450 km) long, rising in the Catskill Mts., SE N.Y., in east and west branches, which meet at Hancock. It flows SE along the New York–Pennsylvan...

Collins, Patricia Hill

(Encyclopedia)Collins, Patricia Hill, 1948–, American sociologist and social theorist, b. Philadelphia, Ph.D. Brandeis University, 1984. A noted ...

Grey, Zane

(Encyclopedia)Grey, Zane, 1872–1939, American writer of Western stories, b. Zanesville, Ohio, as Pearl Zane Gray, grad. Univ. of Pennsylvania, 1896. His melodramatic tales of the West and Southwest are vivid in t...

Bawendi, Moungi

(Encyclopedia)Moungi Bawendi, 1961–, b. Paris, France, American-Tunisian-French chemist, studied at Harvard University (B.A., 1982; M.A.1983) and the University of ...

Allen, William

(Encyclopedia)Allen, William, 1704–80, American jurist, b. Philadelphia. He and his father-in-law, Andrew Hamilton, decided the choice of Philadelphia instead of Chester as provincial capital, and he helped finan...

West Chester

(Encyclopedia)West Chester, borough (1990 pop. 18,041), seat of Chester co., SE Pa., W of Philadelphia; inc. 1799. Primarily residential, West Chester was long the trade and processing center for an agricultural re...

Oberholtzer, Ellis Paxson

(Encyclopedia)Oberholtzer, Ellis Paxson ōˈbərhōltˌsər [key], 1868–1936, American historian, b. Chester co., Pa. He studied abroad and then worked on various Philadelphia newspapers. He edited the Manufactur...