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tachometer

(Encyclopedia)tachometer tăkŏmˈətər [key], instrument that indicates the speed, usually in revolutions per minute, at which an engine shaft is rotating. Some tachometers, especially those used in automobiles, ...

theodolite

(Encyclopedia)theodolite thēŏdˈəlītˌ [key], calibrated optical instrument used to determine relative position in surveying, navigation, and meteorology. It is similar in construction to a surveyor's transit, ...

sitar

(Encyclopedia)CE5 Sitar sitar sĭtärˈ [key], fretted string instrument with a gourdlike body and a long neck, similar to the lute. It has from 3 to 7 gut strings, tuned in fourths or fifths (or both), and a l...

spectroheliograph

(Encyclopedia)spectroheliograph, device for photographing the surface of the sun in a single wavelength of light, usually one corresponding to a chief element contained in the sun, e.g., hydrogen or calcium; the re...

Siding Spring Observatory

(Encyclopedia)Siding Spring Observatory, astronomical observatory located on Siding Spring Mountain, near Coonabarabran, at an altitude of nearly 4,000 ft (1,220 m) in the Warrumbungle Mts. of New South Wales, Aust...

Wuorinen, Charles Peter

(Encyclopedia)Wuorinen, Charles Peter wûrˈĭnən [key], 1938–2020, American composer, conductor, and pianist, b. New York City. Wuorinen studied at Columbia (B.A., 1961; M.A., 1963) and taught there, at the Man...

Shankar, Ravi

(Encyclopedia)Shankar, Ravi (Robindra Shankar Chowdhury), 1920–2012, Indian sitarist and composer, b. Varanasi. He was the first Indian instrumentalist to attain an international reputation and is credited with i...

Dartmouth College Case

(Encyclopedia)Dartmouth College Case, decided by the U.S. Supreme Court in 1819. The legislature of New Hampshire, in 1816, without the consent of the college trustees, amended the charter of 1769 to make Dartmouth...

commercial paper

(Encyclopedia)commercial paper, type of short-term negotiable instrument, usually an unsecured promissory note, that calls for the payment of money at a specified date. Because it is not backed by collateral, comme...

annexation

(Encyclopedia)annexation, in international law, formal act by which a state asserts its sovereignty over a territory previously outside its jurisdiction. Many kinds of territory have been subject to annexation, chi...