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clef

(Encyclopedia)clef, in music: see musical notation. ...

tonic sol-fa

(Encyclopedia)tonic sol-fa: see musical notation. ...

signature

(Encyclopedia)signature, in music: see musical notation. ...

hourglass

(Encyclopedia)hourglass, glass instrument for measuring time, usually consisting of two bulbs united by a narrow neck. One bulb is filled with fine sand that runs through the neck into the other bulb in an hour's t...

snare drum

(Encyclopedia)snare drum, small drum having a drumhead at either end. One head is struck with wooden drumsticks, and on the other are stretched several strings, called snares, which cause a rattling against the hea...

Baird, John Logie

(Encyclopedia)Baird, John Logie, 1888–1946, Scottish inventor. In 1926 he gave the first demonstration of true television with a televisor of his own invention that differed from later instruments in being partia...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Middlesborough

(Encyclopedia)Middlesborough, city (1990 pop. 11,328), Bell co., S Ky., in the Cumberland Mts. near the point where Kentucky, Tennessee, and Virginia meet; inc. 1890. It is a coal-mining center with meat and coal p...

Williams, Robert R., Jr.

(Encyclopedia)Williams, Robert R., Jr., 1886–1965, American chemist, b. India, grad. Univ. of Chicago (B.S., 1907); brother of Roger John Williams. Research undertaken in 1910, while he was chemist (1908–15) at...

Sacré-Cœur

(Encyclopedia)Sacré-Cœur säkrā-körˈ [key], basilica in Paris, dedicated to the Sacred Heart of Jesus. It is a famous landmark atop the Montmartre, from which it dominates the city. Built (1875–1914) by subs...