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Raman effect

(Encyclopedia)Raman effect räˈmən [key], appearance of additional lines in the spectrum of monochromatic light that has been scattered by a transparent material medium. The effect was discovered by C. V. Raman i...

Pecos National Historical Park

(Encyclopedia)Pecos National Historical Park, 6,671 acres (2,702 hectares), N New Mexico; est. as a national monument 1965, designated a national historical park 1990. The park contains the remains of the Pecos pue...

Confederation, Articles of

(Encyclopedia)Confederation, Articles of, in U.S. history, ratified in 1781 and superseded by the Constitution of the United States in 1789. The imperative need for unity among the new states created by the America...

siege

(Encyclopedia)siege, assault against a city or fortress with the purpose of capturing it. The history of siegecraft parallels the development of fortification and, later, artillery. In early times battering rams an...

Dunant, Jean Henri

(Encyclopedia)Dunant, Jean Henri zhäN äNrēˈ dünäNˈ [key], 1828–1910, Swiss philanthropist and founder of the International Red Cross, b. Geneva. In 1862 appeared his Un souvenir de Solférino (tr. The Orig...

Cotman, John Sell

(Encyclopedia)Cotman, John Sell kŏtˈmən [key], 1782–1842, English landscape painter and etcher. He was a leading representative of the Norwich school. Cotman studied in London and in 1806 settled in Norwich wh...

Alferov, Zhores Ivanovich

(Encyclopedia)Alferov, Zhores Ivanovich, 1930–2019, Russian physicist, b. Vitebsk (now in Belarus), Ph.D. V. I. Ulyanov Electrotechnical Institute, 1952. He joined the research staff of the A. F. Ioffe Physico-Te...

Dahlgren, John Adolphus Bernard

(Encyclopedia)Dahlgren, John Adolphus Bernard dălˈgrən [key], 1809–70, American naval officer, b. Philadelphia. Appointed a midshipman in 1826, he had a long and honorable naval career. In charge of ordnance a...

Coleman, William Thaddeus, Jr.

(Encyclopedia)Coleman, William Thaddeus, Jr., 1920–2017, African-American lawyer and U.S. cabinet official, b. Philadelphia, grad. Univ. of Pennsylvania, 1941, Harvard Law School, 1946. He clerked for Justice Fra...

Esher, Reginald Baliol Brett, 2d Viscount

(Encyclopedia)Esher, Reginald Baliol Brett, 2d Viscount bālˈyəl, ēˈshər [key], 1852–1930, English historian and government official. After sitting in Parliament (1880–85) as a Liberal, he thereafter prefe...