(Encyclopedia) Tanganyika, Lake, second largest lake of Africa, c.12,700 sq mi (32,890 sq km), E central Africa on the borders of Tanzania, Congo (Kinshasa), Zambia, and Burundi. It is c.420 mi (680…
(Encyclopedia) Wilson, Robert Woodrow, 1936–, American radio astronomer, b. Houston, Tex., Ph.D. California Institute of Technology, 1962. In 1964 he and co-researcher Arno Penzias began monitoring…
(Encyclopedia) triceps, any muscle having three heads, or points of attachment, but especially the triceps brachii at the back of the upper arm. One head originates on the shoulder blade and two on…
(Encyclopedia) torsion balance, instrument used to measure small forces. It is based on the principle that a wire or thread resists twisting with a force that is proportional to the stress. The…
(Encyclopedia) Tewodros II or Theodore II, 1818–68, emperor of Ethiopia (1855–68), originally named Kasa or Lij Kasa. He was a commoner and a bold and clever warrior. He seized control of his native…
(Encyclopedia) Rockville, city (1990 pop. 44,835), seat of Montgomery co., W central Md., a NW suburb of Washington, D.C.; settled c.1760s, inc. as a city 1860. It has several scientific research and…
(Encyclopedia) Shapley, HarlowShapley, Harlowshăpˈlē [key], 1885–1972, American astronomer, b. Nashville, Mo., grad. Univ. of Missouri, 1910, Ph.D. Princeton, 1913. He was astronomer at Mt. Wilson…
(Encyclopedia) Barentz or Barents, WillemBarentz or Barents, Willemboth: vĭˈləm bäˈrənts [key], d. 1597, Dutch navigator. He made three voyages (1594, 1595, 1596–97) in search of the Northeast…
(Encyclopedia) Stanley, William Meredith, 1904–71, American biochemist, b. Ridgeville, Ind., Ph.D. Univ. of Illinois, 1929. He was a professor at the Rockefeller Institute for Medical Research (now…
(Encyclopedia) Barth, HeinrichBarth, Heinrichhīnˈrĭkh bärt [key], 1821–65, German explorer in British service. After traveling (1845–47) through the Levant and N Africa, he entered the service of the…
