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Twenty-one Demands

(Encyclopedia)Twenty-one Demands (1915), instrument by which Japan secured temporary hegemony over China. Japan used its declaration of war against Germany (Aug., 1914) as grounds for invading Kiaochow, the German ...

radio range

(Encyclopedia)radio range, geographically fixed radio transmitter that radiates coded signals in all directions to enable aircraft and ships to determine their bearings. An aircraft or ship can determine its line o...

Oliveros, Pauline

(Encyclopedia)Oliveros, Pauline, 1932–2016, American composer and musician, b. Houston, Tex., studied Univ. of Houston, San Francisco State College (B.A., 1957). She began playing the accordion as a child, and it...

kaleidoscope

(Encyclopedia)kaleidoscope kəlīˈdəskōp [key], optical instrument that uses mirrors to produce changing symmetrical patterns. Invented by the Scottish physicist Sir David Brewster in 1816, the device is usually...

stroboscope

(Encyclopedia)stroboscope strŏbˈəskōp [key], optical instrument for making a moving object appear to be slowed down or stationary. This effect is created by interrupting the observer's view so that the object i...

Socinianism

(Encyclopedia)Socinianism sōsĭˈnēənĭzəm [key], anti-Trinitarian religious movement organized in Poland in the 16th cent. by Faustus Socinus. Antecedents of the movement were such Italian humanist reformers a...

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...

voice, sound produced by living beings

(Encyclopedia)voice, sound produced by living beings. The source of the sound in human speaking and singing is the vibration of the vocal cords, which are inside the larynx, and the production of the sounds is call...

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 ...

Martin, Steve

(Encyclopedia)Martin, Steve, 1945–, American comedian, actor, and writer, b. Waco, Tex. An Emmy-winning television comedy writer in the late 1960s for the Smothers ...