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Mankato

(Encyclopedia) MankatoMankatomănkāˈtō [key], city (1990 pop. 31,477), seat of Blue Earth co., S Minn., at the confluence of the Blue Earth and Minnesota rivers; inc. 1865. It is a trade and…

Waterloo, city, United States

(Encyclopedia) Waterloo, city (1990 pop. 66,467), seat of Black Hawk co., NE Iowa, on the Cedar River; inc. 1868. Originally a center for sawmills and flour mills, Waterloo is a trade and industrial…

North Little Rock

(Encyclopedia) North Little Rock, city (1990 pop. 61,741), Pulaski co., central Ark., on the Arkansas River opposite Little Rock; settled c.1856, inc. as a city 1903. North Little Rock lies in a…

agronomy

(Encyclopedia) agronomyagronomyəgrŏnˈəmē [key], branch of agriculture dealing with various physical and biological factors—including soil management, tillage, crop rotation, breeding, weed control,…

Muncie

(Encyclopedia) MuncieMunciemŭnˈsē [key], city (1990 pop. 71,035), seat of Delaware co., E Ind., on the White River; inc. 1854. It is a trade, processing, and manufacturing center. The city is in a…

insect repellent

(Encyclopedia) insect repellent, substance applied to the skin in order to provide protection against biting insects, primarily mosquitoes, ticks, chiggers, fleas, and certain flies. The most…

drying oil

(Encyclopedia) drying oil, any of several natural oils which, when exposed to the air, oxidize to form a tough, elastic film. The common drying oils are cottonseed oil (see cotton), corn oil, soybean…

Julian, Percy Lavon

(Encyclopedia) Julian, Percy Lavon, 1899–1975, African-American chemist, inventor, and businessman, b. Montgomery, Ala., grad. DePauw Univ. (A.B., 1920), Harvard (M.A., 1923), and the Univ. of Vienna…

Carver, George Washington

(Encyclopedia) Carver, George Washington, 1864?–1943, American agricultural chemist, b. Diamond, Mo., grad. Iowa State College (now Iowa State Univ.; B.S., 1894; M.A. 1896). Born a slave, he later,…

margarine

(Encyclopedia) margarine, manufactured substitute for butter. It consists of a blend of vegetable oils or meat fats (or a combination of both) mixed with milk and salt. It was developed in the late…