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Himera

(Encyclopedia)Himera hĭmˈərə [key], ancient city on the north coast of Sicily, founded by Greeks in the 7th cent. b.c. Here in 480 b.c. (a traditional date) forces led by Gelon routed the Carthaginians led by H...

April Fool's Day

(Encyclopedia)April Fool's Day or All Fool's Day, holiday of uncertain origin, known for practical joking and celebrated on the first of April. Prior to the adoption of the Gregorian calendar in 1564, the date was ...

Scott, James Brown

(Encyclopedia)Scott, James Brown, 1866–1943, American lawyer and educator, b. Ontario. He studied international law at Harvard and at Berlin, Heidelberg, and Paris. He was dean of the law schools of the Univ. of ...

Lobachevsky, Nikolai Ivanovich

(Encyclopedia)Lobachevsky, Nikolai Ivanovich nyĭkəlīˈ ēväˈnəvĭch ləbəchĕfˈskē [key], 1793–1856, Russian mathematician. A pioneer in non-Euclidean geometry, he challenged Euclid's fifth postulate tha...

cylinder

(Encyclopedia)CE5 Cylinder cylinder, in mathematics, surface generated by a line moving parallel to a given fixed line and continually intersecting a given fixed curve called the directrix; each line of the fam...

staff

(Encyclopedia)staff, in musical notation, a set of horizontal lines upon and between which notes are written so as to determine their relative pitch, and in connection with a clef, their absolute pitch. Staffs with...

Rzhev

(Encyclopedia)Rzhev ərzhĕfˈ [key], city (1989 est. pop. 70,000), NW European Russia, on the Volga River and on a major rail line to Moscow. It has textile plants and repair shops for railroad equipment. Rzhev, a...

Golden Section

(Encyclopedia)CE5 Rectangle ABCD is a golden rectangle. Removing the square AEFD leaves the rectangle EBCF Golden Section, in mathematics, division of a line segment into two segments such that the ratio of the...

Moore, John Bassett

(Encyclopedia)Moore, John Bassett, 1860–1947, American authority on international law, b. Smyrna, Del. He was admitted to the Delaware bar in 1883. He was (1885–86) a law clerk in the Dept. of State and was (18...

Telluride

(Encyclopedia)Telluride tĕlˈyərīd [key], town (1990 pop. 1,309), seat of San Miguel co., SW Colo., on the San Miguel River in the San Juan Mts., inc. 1887. A trade center in a sheep, dairying, and mining (gold,...