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isobar

(Encyclopedia) isobarisobarīˈsəbärˌ [key] or isobaric lineisobarīˌsəbărˈĭk [key], line drawn on a weather map through points of equal atmospheric pressure. Isobars are used to define cyclones (low-…

Oort, Jan Hendrik

(Encyclopedia) Oort, Jan HendrikOort, Jan Hendrikōrt [key], 1900–1992, Dutch astronomer. He confirmed (1927) Bertil Lindblad's theory of the Milky Way galaxy's rotation. In the 1950s he and his…

De la Beche, Sir Henry Thomas

(Encyclopedia) De la Beche, Sir Henry ThomasDe la Beche, Sir Henry Thomasdə lä bāsh, dĕləbĕshˈ [key], 1796–1855, English geologist. As a result of his private undertaking to prepare a geological map…

Allouez, Claude Jean

(Encyclopedia) Allouez, Claude JeanAllouez, Claude Jeanklōd zhäN älwāˈ [key], 1622–89, French Jesuit missionary in Canada and the American Midwest. After arriving (1658) in Canada he served at posts…

Branner, John Casper

(Encyclopedia) Branner, John Casper, 1850–1922, American geologist, b. New Market, Tenn. He made geological investigations in Brazil (1874–84); the results of these studies and of others made in…

Eratosthenes

(Encyclopedia) EratosthenesEratosthenesĕrətŏsˈthənēz [key], c.275–c.195 b.c., Greek scholar, b. Cyrene. A pupil of Callimachus in Athens, he became (c.240 b.c.) head of the library at Alexandria.…

Petty, Sir William

(Encyclopedia) Petty, Sir William, 1623–87, English statistician and physician. He was a founder of the Royal Society and was physician general to the army of Ireland in 1652. Petty's survey of the…

Goode, John Paul

(Encyclopedia) Goode, John PaulGoode, John Paulg&oobreve;d [key], 1862–1932, American geographer and cartographer, b. Stewartville, Minn., grad. Univ. of Minnesota, 1889, Ph.D. Univ. of…

Logan, Sir William Edmond

(Encyclopedia) Logan, Sir William Edmond, 1798–1875, Canadian geologist. Educated in England, he managed (1831–38) coal mines and a copper smelter in Wales. In addition to making studies of clays…

Buch, Christian Leopold, Freiherr von

(Encyclopedia) Buch, Christian Leopold, Freiherr vonBuch, Christian Leopold, Freiherr vonkrĭsˈtyän lāˈōpôlt frīˈhĕr fən b&oomacr;kh [key], 1774–1853, German geologist and paleontologist, graduate…