Columbia Encyclopedia

(Encyclopedia) rock music, type of music originating in the United States in the mid-1950s and increasingly popular throughout much of the world. A turning point in rock music occurred in the mid-1970s in the ...

(Encyclopedia) children's book illustration, any type of picture or decorative work produced for books specifically intended for a youthful audience. During the 1960s a number of seldom-used techniques were introd...

(Encyclopedia) Presidents of the United States

(Encyclopedia) American Revolution, 1775–83, struggle by which the Thirteen Colonies on the Atlantic seaboard of North America won independence from Great Britain and became the United States. It is also called th...

(Encyclopedia)  CE5 New Hampshire, one of the New England states of the NE United States. It is bordered by Massachusetts (S), Vermont, with the Connecticut River forming the boundary (W), the Canadian province of...

(Encyclopedia)  CE5 Internal-combustion engines: In the four-stroke reciprocating engine (above), a mixture of fuel and air is taken into the chamber on the down-stroke of the piston, is compressed on the up-strok...

(Encyclopedia)  CE5 A professional football field. College teams use a similar field except that the inbound lines are 53 ft 4 in. (16.25 m) from the sidelines. football, any of a number of games in which two opp...

(Encyclopedia) Washington, D.C., capital of the United States, coextensive (since 1878, when Georgetown became a part of Washington) with the District of ...

(Encyclopedia) calendar [Lat., from Kalends], system of reckoning time for the practical purpose of recording past events and calculating dates for future plans. The calendar is based on noting ordinary and easily o...

(Encyclopedia)  CE5 Alabama ăləbămˈə [key], state in the SE United States. It is bordered by Tennessee (N), Georgia (E), Florida and the Gulf of Mexico (S), and Mississippi (W). In 1954 the U.S. Supreme Co...