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Welsbach, Carl Auer, Baron von

(Encyclopedia)Welsbach, Carl Auer, Baron von kärl ouˈər bärōnˈ fən vĕlsˈbäkh [key], 1858–1929, Austrian chemist. He discovered the rare earth elements neodymium and praseodymium (1885) and lutetium (c.1...

Michelson, Albert Abraham

(Encyclopedia)Michelson, Albert Abraham mīˈkəlsən [key], 1852–1931, American physicist, b. Strelno, Prussia, grad. Annapolis, 1873, and studied at Berlin, Heidelberg, and Paris. He was professor of physics at...

MacLeish, Archibald

(Encyclopedia)MacLeish, Archibald məklēshˈ [key], 1892–1982, American poet and public official, b. Glencoe, Ill., grad. Yale, 1915, LL.B Harvard, 1919. He practiced law for only three years and during the 1920...

Melanchthon, Philip

(Encyclopedia)Melanchthon, Philip məlăngkˈthən [key], 1497–1560, German scholar and humanist. He was second only to Martin Luther as a figure in the Lutheran Reformation. His original name was Schwarzerd [Ger...

hydrology

(Encyclopedia)hydrology, study of water and its properties, including its distribution and movement in and through the land areas of the earth. The hydrologic cycle consists of the passage of water from the oceans ...

ionosphere

(Encyclopedia)ionosphere īŏnˈəsfēr [key], series of concentric ionized layers forming part of the upper atmosphere of the earth from around 30 to 50 mi (50 to 80 km) to 250 to 370 mi (400 to 600 km) where it m...

dysprosium

(Encyclopedia)dysprosium dĭsprōˈzēəm [key] [Gr.,=hard to get at], metallic chemical element; symbol Dy; at. no. 66; at. wt. 162.500; m.p. 1,412℃; b.p. 2,562℃; sp. gr. 8.54 at 25℃; valence+3. Dysprosium i...

Aldrin, Buzz

(Encyclopedia)Aldrin, Buzz ôlˈdrĭn [key] (Edwin Eugene Aldrin, Jr.), 1930–, American astronaut, b. Montclair, N.J. After graduating from West Point (1951), Aldrin joined the U.S. air force and flew 66 combat m...

Dyer, Sir Edward

(Encyclopedia)Dyer, Sir Edward, 1543?–1607, Elizabethan poet. A friend of Sidney and Spenser, he was celebrated in his day as an elegist. His best-known poem is “My Mind to Me a Kingdom Is.” ...

Jones, Jim

(Encyclopedia)Jones, Jim, 1931–78, American religious leader, b. Lynn, Indiana. An influential Indianapolis preacher from the 1950s and onetime head of the city's Human Rights Commission, Jones formed the raciall...