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Perth, city, Australia

(Encyclopedia) Perth, city (2016 pop. 21,797, Greater Perth 2016 pop. 1,943,858), capital of Western Australia, SW Australia, on the Swan River estuary. Fremantle is Perth's port. Perth is a…

correspondence principle

(Encyclopedia) correspondence principle, physical principle, enunciated by Niels Bohr in 1923, according to which the predictions of the quantum theory must correspond to the predictions of the…

Ammianus Marcellinus

(Encyclopedia) Ammianus MarcellinusAmmianus Marcellinusămēāˈnəs märsĭlīˈnəs [key], c.330–c.400, Roman historian, b. Antioch. After retiring from a successful military career, he wrote a history of…

Hauptman, Herbert Aaron

(Encyclopedia) Hauptman, Herbert AaronHauptman, Herbert Aaronhouptˈmän [key], 1917–2011, American chemist, b. Bronx, N.Y., grad. City College of New York (B.S., 1937) and Univ. of Maryland (Ph.D.,…

Iorga, Nicolae

(Encyclopedia) Iorga, NicolaeIorga, Nicolaenēˈkōlī yôrˈgä [key], 1871–1940, Romanian historian and statesman. A professor at the Univ. of Bucharest, he founded (1910) and later led the National…

Leeuwenhoek, Antony van

(Encyclopedia) Leeuwenhoek, Antony vanLeeuwenhoek, Antony vanänˈtōnē vän lāˈvənh&oomacr;kˌ [key], 1632–1723, Dutch student of natural history and maker of microscopes, b. Delft. His use of lenses…

William of Tyre

(Encyclopedia) William of TyreWilliam of Tyretīˈər [key], b. c.1130, d. before 1185, historian and churchman. Born in the Latin Kingdom of Jerusalem and possibly of French extraction, he received his…

boiler

(Encyclopedia) boiler, device for generating steam. It consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat…

half-timber house

(Encyclopedia) half-timber house, type of construction of the Middle Ages in N Europe, used chiefly for dwellings. Some French examples date from the 12th cent., and by the 13th cent. the building…

Kreuger, Ivar

(Encyclopedia) Kreuger, IvarKreuger, Ivarēˈvär kr&oomacr;ˈgər [key], 1880–1932, Swedish financier. After studying engineering in Stockholm and engaging in construction enterprises in the United…