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Slidell

(Encyclopedia) SlidellSlidellslīdĕlˈ [key], city (1990 pop. 24,124), St. Tammany parish, SE La., near Lake Pontchartrain, there crossed by a bridge to New Orleans; inc. 1888. Originally a…

Bradley, James

(Encyclopedia) Bradley, James, 1693–1762, English astronomer. His discovery of the aberration of light, announced in 1728, provided an important line of evidence for the motion of the earth around…

Wexler, Nancy

(Encyclopedia) Wexler, Nancy, 1945–, American geneticist and neuropsychologist, b. Washington, D.C., Ph.D. Univ. of Michigan, 1974. After her mother was diagnosed with Huntington's disease in 1968,…

Kwajalein

(Encyclopedia) KwajaleinKwajaleinkwäˈjälān, –lēn, –lĭn [key], coral atoll, 6.5 sq mi (16.8 sq km), central Pacific, in the Ralik Chain of the Marshall Islands. The largest atoll of the Marshalls,…

Edwards Air Force Base

(Encyclopedia) Edwards Air Force Base, U.S. military installation, 301,000 acres (121,805 hectares), S Calif., NE of Lancaster; est. 1933. It is one of the largest air force bases in the United…

Pennsylvania State University

(Encyclopedia) Pennsylvania State University, main campus at University Park, State College; land-grant and state supported; coeducational; chartered 1855, opened 1859 as Farmers' High School. It was…

blood count

(Encyclopedia) blood count, method for determining the number of red (erythrocytes) and white (leukocytes) blood cells in a certain volume of blood. This test can be used as a preliminary step in…

Nicaea, First Council of

(Encyclopedia) Nicaea, First Council of, 325, 1st ecumenical council, convened by Roman Emperor Constantine the Great to solve the problems raised by Arianism. It has been said that 318 persons…

equestrianism

(Encyclopedia) equestrianism, art of riding and handling a horse. Horseback riding was practiced as far back as the Bronze Age and was thereafter adapted to commerce, industry, war, sport, and…

centrifuge

(Encyclopedia) centrifugecentrifugesĕnˈtrəfy&oomacr;j [key], device using centrifugal force to separate two or more substances of different density, e.g., two liquids or a liquid and a solid. The…