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Pennsylvania

(Encyclopedia)CE5 Pennsylvania pĕnsəlvāˈnyə [key], one of the Middle Atlantic states of the United States. It is bordered by New Jersey, across the Delaware River (E), Delaware (SE), Maryland (S), West Virg...

Cather, Willa Sibert

(Encyclopedia)Cather, Willa Sibert sīˈbərt kăᵺˈər [key], 1873–1947, American novelist and short-story writer, b. Winchester, Va., considered one of the great American writers of the 20th cent. When she wa...

steel

(Encyclopedia)steel, alloy of iron, carbon, and small proportions of other elements. Iron contains impurities in the form of silicon, phosphorus, sulfur, and manganese; steelmaking involves the removal of these imp...

Whistler, James Abbott McNeill

(Encyclopedia)Whistler, James Abbott McNeill, 1834–1903, American painter, etcher, wit, and eccentric, b. Lowell, Mass. Whistler was dismissed from West Point for insufficient knowledge of chemistry and from the ...

Boone, Daniel

(Encyclopedia)Boone, Daniel, 1734–1820, American frontiersman, b. Oley (now Exeter) township, near Reading, Pa. The Boones, English Quakers, left Pennsylvania in 1750 and settled (1751 or 1752) in the Yadkin vall...

Stein, Gertrude

(Encyclopedia)Stein, Gertrude, 1874–1946, American author and patron of the arts, b. Allegheny (now part of Pittsburgh), Pa. A celebrated personality, she encouraged, aided, and influenced—through her patronage...

broadcasting

(Encyclopedia)broadcasting, transmission, usually using radio frequencies, of sound or images to a large number of radio or television receivers. In the United States the first regularly scheduled radio broadcasts ...

pollution

(Encyclopedia)pollution, contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land by wastes (see air pollution; water pollution; s...

museums of art

(Encyclopedia)museums of art, institutions or buildings where works of art are kept for display or safekeeping. The word museum derives from the Greek mouseion, meaning temple to the works of the Muses. This articl...

American Federation of Labor and Congress of Industrial Organizations

(Encyclopedia)American Federation of Labor and Congress of Industrial Organizations (AFL-CIO), a federation of autonomous labor unions in the United States, Canada, Mexico, Panama, and U.S. dependencies, formed in ...