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Piazzolla, Ástor Pantaleón

(Encyclopedia)Piazzolla, Ástor Pantaleón, 1921–92, Argentinian composer and player of the bandoneón (a large accordionlike instrument), b. Mar del Plata. He spent much of his childhood in New York, returned (1...

rectifier

(Encyclopedia)rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them ...

voltmeter

(Encyclopedia)voltmeter, instrument used to measure differences of electric potential, commonly called voltage, in volts or units that are multiples or fractions of volts. A voltmeter is usually combined with an am...

Steinmetz, Charles Proteus

(Encyclopedia)Steinmetz, Charles Proteus stīnˈmĕts [key], 1865–1923, American electrical engineer, b. Breslau, Germany, studied at the Univ. of Breslau. Forced to flee Germany because of his socialist activiti...

bus

(Encyclopedia)bus [Lat. omnibus=for all], large public conveyance. A horse-drawn urban omnibus was introduced in Paris in 1662 by Blaise Pascal and his associates, but it remained in operation for only a few years....

Nacogdoches

(Encyclopedia)Nacogdoches năkˌədōˈchĭs [key], city (1990 pop. 30,872), seat of Nacogdoches co., E Tex., in a pine and hardwood forest area; settled 1779. Industries in the city include lumbering, livestock an...

Huntsville, cities, United States

(Encyclopedia)Huntsville. 1 City (2020 pop. 215,006), seat of Madison co., N Ala.; inc. 1811. A major center for U.S. space research, Huntsville is the site of the ...

Portage

(Encyclopedia)Portage [1,] [2] pôrˈtəj; [3] pôrˈtĭj [key]. 1 Town (1990 pop. 29,060), Porter co., NW Ind., a suburb of Gary, on Lake Michigan; inc. 1959. The town, which was once surrounded by great industrie...

Qingdao

(Encyclopedia)Qingdao tsĭngˈtouˈ, chĭngˈdouˈ [key], city (1994 est. pop. 1,584,100), SE Shandong prov., E China, on the Yellow Sea. With an excellent ice-free harbor, it is a major fishing and trade port of C...

Northampton, city, England

(Encyclopedia)Northampton, city (1991 pop. 154,172) and district, Northamptonshire, central England, on the Nene River. The city of Northampton is the county seat. Shoemaking has long been the chief industry; engin...