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Cripple Creek

(Encyclopedia) Cripple Creek, village (2020 pop. 1,155), alt. 9,375 ft (2,858 m), seat of Teller co., central Colo.; inc. 1892. Primarily a summer…

Berthollet, Claude Louis, Comte

(Encyclopedia) Berthollet, Claude Louis, ComteBerthollet, Claude Louis, Comteklōd lwē, kôNt bĕrtōlāˈ [key], 1748–1822, French chemist. His contributions to chemistry include the analysis of ammonia…

Hakluyt, Richard

(Encyclopedia) Hakluyt, RichardHakluyt, Richardhăkˈl&oomacr;t, hăkˈəlwĭt [key], 1552?–1616, English geographer. He graduated in 1574 from Oxford, where he later lectured on geography. A…

Wollaston, William Hyde

(Encyclopedia) Wollaston, William Hyde, 1766–1828, English scientist, M.D. Cambridge, 1793. His wide-ranging scientific achievements include the discovery (1802) of the dark lines (Fraunhofer lines)…

Le Verrier, Urbain Jean Joseph

(Encyclopedia) Le Verrier, Urbain Jean JosephLe Verrier, Urbain Jean JosephürbăNˈ zhäN zhôzĕfˈ ləvĕryāˈ [key], 1811–77, French astronomer who made calculations that led to the discovery of the planet…

Ruska, Ernst

(Encyclopedia) Ruska, Ernst, 1906–88, German electrical engineer. By applying the discovery that electron waves are 100,000 times shorter than those of light, Ruska built a microscope that used a…

Stern, Otto

(Encyclopedia) Stern, OttoStern, Ottostûrn, Ger. ôˈtō shtĕrn [key], 1888–1969, American physicist, b. Germany, Ph.D. Univ. of Breslau, 1912. After resigning from his post at the Univ. of Hamburg in…

Cech, Thomas Robert

(Encyclopedia) Cech, Thomas RobertCech, Thomas Robertchĕk [key], 1947–, American microbiologist, b. Chicago, grad. Univ. of California, Berkeley. A professor at the Univ. of Colorado, he discovered…

Lowell Observatory

(Encyclopedia) Lowell Observatory, astronomical observatory located in Flagstaff, Ariz.; it was founded in 1894 by Percival Lowell, the American astronomer who popularized the idea that Mars might…

Cabot, John

(Encyclopedia) Cabot, John, fl. 1461–98, English explorer, probably b. Genoa, Italy. He became a citizen of Venice in 1476 and engaged in the Eastern trade of that city. This experience, it is…