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Saint Charles

(Encyclopedia)Saint Charles. 1 City (1990 pop. 22,501), Kane co., NE Ill., on the Fox River, a suburb of Chicago; inc. 1850. Located in an agricultural area (corn and soybeans), the city has food-processing, alumin...

Ozark National Scenic Riverways

(Encyclopedia)Ozark National Scenic Riverways, 80,786 acres (32,707 hectares), along the Current and Jacks Fork rivers, SE Mo.; authorized 1964 as the first national scenic river; est. 1972. Many springs flow into ...

Doniphan, Alexander William

(Encyclopedia)Doniphan, Alexander William dŏnˈĭfən [key], 1808–87, American lawyer and soldier, b. Mason co., Ky. He began (1830) to practice law in Lexington, Mo., and served three terms in the state legisla...

complex variable analysis

(Encyclopedia)complex variable analysis, branch of mathematics that deals with the calculus of functions of a complex variable, i.e., a variable of the form z=x+iy, where x and y are real and i=−1 (see number). A...

number

(Encyclopedia)number, entity describing the magnitude or position of a mathematical object or extensions of these concepts. A real or complex number z is called algebraic if it is the root of a polynomial equati...

Limbaugh, Rush

(Encyclopedia)Limbaugh, Rush (Rush Hudson Limbaugh 3d) lĭmˈbô [key], 1951–2021, conservative radio...

Marbut, Curtis Fletcher

(Encyclopedia)Marbut, Curtis Fletcher märˈbət [key], 1863–1935, American geologist, b. Verona, Mo., grad. Univ. of Missouri (B.S., 1889) and Harvard (M.A., 1844). As professor of geology at the Univ. of Missou...

Frank, Glenn

(Encyclopedia)Frank, Glenn, 1887–1940, American editor and educator, b. Queen City, Mo., grad. Northwestern Univ., 1912. He was assistant to the president of Northwestern Univ. from 1912 to 1916. In 1919, Frank j...

Engelmann, George

(Encyclopedia)Engelmann, George ĕngˈəlmən [key], 1809–84, American physician and botanist, b. Frankfurt-am-Main, Germany, educated at the universities of Heidelberg and Würzburg (M.D., 1831). Emigrating to A...

Alton

(Encyclopedia)Alton ôlˈtən [key], city, Madison co., SW Ill., on bluffs of the Mississippi River 5 mi (8.1 km) above its confluence with the Missouri; inc. 1837. Alton is a shipping ...