(Encyclopedia) Avogadro's numberAvogadro's numberävōgäˈdrō [key] [for Amedeo Avogadro], number of particles contained in one mole of any substance; it is equal to 602,252,000,000,000,000,000,000, or…
(Encyclopedia) spinal puncture, surgical penetration of the spinal canal by a hollow needle introduced between two of the lumbar vertebrae. The arrangement permits injection of antibiotics or…
(Encyclopedia) Candela, Felix (Félix Candela Outeriño)Candela, Felixfāˈlēks kändāˈlä [key], 1910–97, Mexican-American architect, b. Madrid. Candela studied in Madrid but was forced to flee Spain…
Senate Years of Service: 1804-1815Party: Democratic RepublicanGILES, William Branch, a Representative and a Senator from Virginia; born near Amelia Court House, Amelia County, Va., August 12,…
Editor
Paul Lagassé
Senior Editors
Lora Goldman Archie Hobson Susan R. Norton
Associate Editors
Barry J. Katzen Alan D. Levy Theodore Zinn
Contributors
Curt Bertschi Helen Chumbley Jonathan…
First Place: $100,000 scholarship, Shannon Lisa Babb, 18, of Highland, Utah, for an environmental science project identifying the human impact to water quality along…
Speed is the measure of motion. You can find it by dividing the distance covered by the time it takes to travel that distance.Speed of Light If a star is 10 light-years away, it is about 60…
(Encyclopedia) MelunMelunməlöNˈ [key], town (1990 pop. 36,489), capital of Seine-et-Marne dept., N central France, SE of Paris. It is an important industrial center where automobile bodies, airplane…
(Encyclopedia) Guadalupe Hidalgo, Treaty of, 1848, peace treaty between the United States and Mexico that ended the Mexican War. Negotiations were carried on for the United States by Nicholas P.…
