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Crookes tube

(Encyclopedia) Crookes tube, device invented by Sir William Crookes (c.1875) consisting essentially of a sealed glass tube from which nearly all the air has been removed and through the walls of…

algorithm

(Encyclopedia) algorithmalgorithmălˈgərĭᵺˌəm [key] or algorismalgorism–rĭzˌəm [key] [for Al-Khowarizmi], a clearly defined procedure for obtaining the solution to a general type of problem, often…

cutting

(Encyclopedia) cutting, in horticulture, part of a plant stem, leaf, or root cut off and used for producing a new plant. It is a convenient and inexpensive method of propagation, not possible for all…

Fogazzaro, Antonio

(Encyclopedia) Fogazzaro, AntonioFogazzaro, Antonioäntôˈnyō fōgät-tsäˈrō [key], 1842–1911, Italian novelist and poet. His first work was a verse romance, Miranda (1874). Primarily concerned with…

Haussmann, Georges Eugène, Baron

(Encyclopedia) Haussmann, Georges Eugène, BaronHaussmann, Georges Eugène, Baronzhôrzh özhĕnˈ bärôNˈ ōsmänˈ [key], 1809–91, French civic official and city planner. Distinguished for his bold…

Bonin Islands

(Encyclopedia) Bonin IslandsBonin Islandsbōˈnīn [key], Jap. Ogasawara-gunto, volcanic island group, c.40 sq mi (100 sq km), in the W Pacific Ocean, c.500 mi (800 km) S of Tokyo; part of Tokyo…

Unabomber

(Encyclopedia) Unabomber or UnabomerUnabomberboth: y&oomacr;ˈnəbŏmˌər [key], name given by the FBI to the elusive perpetrator of a series of bombings (1975–95) in the United States that killed 3…

Yermak

(Encyclopedia) Yermak or ErmakYermakboth: yĕrmäkˈ [key], d. 1584?, Russian conqueror of Siberia; his name also occurs as Yermak Timofeyevich. The leader of a band of independent Russian Cossacks, he…

Yhombi-Opango, Jacques Joachim

(Encyclopedia) Yhombi-Opango, Jacques Joachim, 1939–2020, Congolese politician. An army colonel, he became president of the People's Republic of the Congo in 1977 after the assassination of President…

black codes

(Encyclopedia) black codes, in U.S. history, series of statutes passed by the ex-Confederate states, 1865–66, dealing with the status of the newly freed slaves. They varied greatly from state to…