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Wrangel, Friedrich Heinrich Ernst, Graf von

(Encyclopedia)Wrangel, Friedrich Heinrich Ernst, Graf von frēˈdrĭkh hīnˈrĭkh ĕrnst gräf fən vrängˈəl [key], 1784–1877, Prussian field marshal. He fought in the Napoleonic Wars. In 1848 he commanded th...

Starhemberg, Ernst Rüdiger von

(Encyclopedia)Starhemberg, Ernst Rüdiger von, 1899–1956, Austrian politician, a descendant of the 17th-century general of the same name. He took part in Hitler's “beer-hall putsch” of 1923 (see Hitler, Adolf...

Weber, Carl Maria Friedrich Ernst von

(Encyclopedia)Weber, Carl Maria Friedrich Ernst von frēˈdrĭkh ĕrnst fən vāˈbər [key], 1786–1826, German composer and pianist; pupil of Michael Haydn and Abbé Vogler. He made his debut as a pianist at 13 ...

sensationalism

(Encyclopedia)sensationalism, in philosophy, the theory that there are no innate ideas and that knowledge is derived solely from the sense data of experience. The idea was discussed by Greek philosophers and is sho...

logical positivism

(Encyclopedia)logical positivism, also known as logical or scientific empiricism, modern school of philosophy that attempted to introduce the methodology and precision of mathematics and the natural sciences into t...

pitot static system

(Encyclopedia)pitot static system pētōˈ [key], device for measuring the rate at which a fluid flows. Among the principal applications of the device are an airspeed indicator for aircraft and a distance and speed...

Crossfield, Scott

(Encyclopedia)Crossfield, Scott (Albert Scott Crossfield), 1921–2006, American aviator, b. Berkeley, Calif. A fighter pilot and flight instructor in the navy (1942–46) during World War II, he studied aeronautic...

White, Robert Michael

(Encyclopedia)White, Robert Michael, 1924–2010, American aviator, b. New York City. A fighter pilot during World War II, he was shot down over Germany and held in a prisoner-of-war camp (Feb.–Apr, 1945); he was...

Siemens, Sir William

(Encyclopedia)Siemens, Sir William, 1823–83, English electrical engineer, b. Germany; brother of Ernst Werner von Siemens. Originally his name was Carl Wilhelm Siemens. After visiting England to introduce an elec...

jet propulsion

(Encyclopedia)CE5 Types of jet engines: In the propeller-driven turbine a stream of high-velocity gases provides the power to drive the turbine and turn the propeller. In the jet-driven turbine the stream of gas...