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degree-day

(Encyclopedia) degree-day, a unit of measure used to estimate the fuel and power requirements in heating and cooling a building; it is equal to a difference of 1 degree between the outdoor daily…

Catalan art

(Encyclopedia) Catalan artCatalan artkătˈəlăn, –lən [key]. In Catalonia and the territories of the counts of Barcelona, art flowered in the early Middle Ages and continued to flourish through the…

Tsin

(Encyclopedia) Tsin or ChinTsinboth: jhĭn [key], dynasty of China that ruled from 265 to 420, after the period of the Three Kingdoms. It was divided into two phases: the Western Tsin (265–317) and…

jeep

(Encyclopedia) jeep, small, durable automotive vehicle intended for heavy-duty applications and sometimes provided with the capability of delivering driving power to all four wheels. The last feature…

Fielding, Antony Vandyke Copley

(Encyclopedia) Fielding, Antony Vandyke Copley, 1787–1855, English landscape painter in watercolor. For the last 24 years of his life he was president of the Water Colour Society, where he exhibited…

Port Republic

(Encyclopedia) Port Republic, village, NW Va., on the South Fork of the Shenandoah River. During the Civil War, on June 8–9, 1862, the last battle of Confederate Gen. Stonewall Jackson's successful…

Richard Nixon's Resignation Speech

Given on Thursday, August 8, 1974 Good evening. This is the 37th time I have spoken to you from this office in which so many decisions have been made that shape the history of this nation.…

What Is a City-State?

You've seen the word a thousand times, but what does it actually mean? City-states are small, independent areas that have full sovereignty over their domestic and international policies. Unlike in…

mass extinction

(Encyclopedia) mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five…