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Smith, Alfred Emanuel

(Encyclopedia)Smith, Alfred Emanuel, 1873–1944, American political leader, b. New York City. Reared in poor surroundings, he had no formal education beyond grade school and took various jobs—including work in t...

curium

(Encyclopedia)curium kyo͝orˈēəm [key], artificially produced radioactive chemical element; symbol Cm; at. no. 96; mass no. of most stable isotope 247; m.p. about 1,340℃; b.p. 3,110℃; sp. gr. 13.5 (calculate...

Twain, Mark

(Encyclopedia)Twain, Mark, pseud. of Samuel Langhorne Clemens, 1835–1910, American author, b. Florida, Mo. As humorist, narrator, and social observer, Twain is unsurpassed in American literature. His novel The Ad...

National Aeronautics and Space Administration

(Encyclopedia)National Aeronautics and Space Administration (NASA), civilian agency of the U.S. federal government with the mission of conducting research and developing operational programs in the areas of space e...

Laval, Pierre

(Encyclopedia)Laval, Pierre lävälˈ [key], 1883–1945, French politician. Elected (1914) to the chamber of deputies as a Socialist, he held various cabinet posts and in 1926 became a senator as an Independent, ...

Thucydides

(Encyclopedia)Thucydides tho͞osĭdˈĭdēz [key], c.460–c.400 b.c., Greek historian of Athens, one of the greatest of ancient historians. His family was partly Thracian. As a general in the Peloponnesian War he ...

plutonium

(Encyclopedia)plutonium plo͞otōˈnēəm [key], radioactive chemical element; symbol Pu; at. no. 94; mass no. of most stable isotope 244; m.p. 641℃; b.p. 3,232℃; sp. gr. 19.84 at 20℃; valence +3, +4, +5, or ...

Leeward Islands

(Encyclopedia)Leeward Islands lo͞oˈərd, lyo͞oˈ–, lēˈ– [key], northern group of the Lesser Antilles in the West Indies, extending SE from Puerto Rico to the Windward Islands. The principal islands are the...

Hartford

(Encyclopedia)Hartford. <1> City (2020 pop. 121,054), state capital, Hartford co., central Conn., on the west bank of the Connecticut River; settled as Newtown ...

Irving, Washington

(Encyclopedia)Irving, Washington, 1783–1859, American author and diplomat, b. New York City. Irving was one of the first Americans to be recognized abroad as a man of letters, and he was a literary idol at home. ...