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air navigation

(Encyclopedia)air navigation, science and technology of determining the position of an aircraft with respect to the surface of the earth and accurately maintaining a desired course (see navigation). Basic to air ...

surveying

(Encyclopedia)surveying, method of determining accurately points and lines of direction (bearings) on the earth's surface and preparing from them maps or plans. Boundaries, areas, elevations, construction lines, an...

Dewey, John

(Encyclopedia)Dewey, John, 1859–1952, American philosopher and educator, b. Burlington, Vt., grad. Univ. of Vermont, 1879, Ph.D. Johns Hopkins, 1884. He taught at the universities of Minnesota (1888–89), Michig...

Harnoncourt, Nikolaus

(Encyclopedia)Harnoncourt, Nikolaus (Johann Nikolaus Graf de la Fontaine und d'Harnoncourt-Unverzagt), 1929–2016, Austrian conductor, b. Berlin, studied Vienna Music Academy (1948–52). A pioneer in the early-mu...

glockenspiel

(Encyclopedia)CE5 Glockenspiel glockenspiel glŏkˈənspēl [key] [Ger.,=bell-play], percussion instrument. The medieval glockenspiel was a sort of miniature carillon (see bell), sometimes played mechanically b...

lobotomy

(Encyclopedia)lobotomy lōbŏtˈəmē, lə– [key], surgical procedure for cutting nerve pathways in the frontal lobes of the brain. The operation has been performed on mentally ill patients whose behavioral patte...

Bach, Carl Philipp Emanuel

(Encyclopedia)Bach, Carl Philipp Emanuel bäkh [key], 1714–88, German composer; second son of J. S. Bach, his only teacher. While harpsichordist at the court of Frederick the Great, where his chief duty for 28 y...

Kassel

(Encyclopedia)Kassel käsˈəl [key], city (1994 pop. 202,160), Hesse, central Germany, on the Fulda River. It is an industrial, rail, and cultural center. Manufactures include textiles, optical and precision instr...

Quedlinburg

(Encyclopedia)Quedlinburg kvādˈlēnbo͝orkh [key], city (1994 pop. 26,853), Saxony-Anhalt, central Germany, at the foot of the lower Harz Mts. It is an industrial center and an agricultural market. Manufactures i...

Rautavaara, Einojuhani

(Encyclopedia)Rautavaara, Einojuhani, 1928–2016, Finnish composer, b. Helsinki, studied Sibelius Academy, Helsinki (where he was later a professor of composition), and Juilliard. He is regarded as the finest Finn...