Columbia Encyclopedia

(Encyclopedia) home schooling, the practice of teaching children in the home as an alternative to attending public or private elementary or high school. In most cases, one or both of the children's parents serve as ...

(Encyclopedia) Langley, Samuel Pierpont, 1834–1906, American scientist, b. Roxbury, Mass., received only a high school education but continued his studies in science in Boston libraries. He became, in 1866, profes...

(Encyclopedia) Ladysmith Black Mambazo mämbäzˈō [key], choral group formed in 1965 in Ladysmith, South Africa, founded and led (until 2014) by Joseph Shabalala (1941–2020). The group, which sings with a precis...

(Encyclopedia) South Holland, Dutch Zuidholland, province (1994 pop. 3,313,200), c.1,085 sq mi (2,810 sq km), W Netherlands, bounded by the North Sea in the west. The Hague is the capital; other cities include Rotte...

(Encyclopedia) Southern Christian Leadership Conference (SCLC), civil-rights organization founded in 1957 by Martin Luther King, Jr., and headed by him until his assassination in 1968. Composed largely of African-Am...

(Encyclopedia) David and Lucile Packard Foundation, private philanthropic institution that funds nonprofit organizations. It was founded in 1964 by David Packard (1912–96), co-founder of Hewlett-Packard Co., and h...

(Encyclopedia) William and Flora Hewlett Foundation, philanthropic organization founded in 1966 by engineer and entrepeneur William R. Hewlett (1913–2001), co-founder of Hewlett-Packard, his wife, Flora Lamson Hew...

(Encyclopedia) hooks, bell, 1952–2021, American author, poet, social critic, and Black feminist, b. Hopkinsville, Ky., as Gloria Jean Watkins, Stanford Univ. (B.A., ...

(Encyclopedia) pitchblende pĭchˈblĕndˌ [key], dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U3O8) and uranium dioxide (UO2), it usually cont...

(Encyclopedia) Timişoara tēmēshwäˈrä [key], Hung. Temesvár, city (1990 pop. 351,293), W Romania, in the Banat, on the Beja Canal. The chief city of the former Banat of Temesvar, it is a railroad hub and an in...