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Whitney, Asa

(Encyclopedia) Whitney, Asa, 1797–1872, American merchant and transcontinental railroad projector, b. North Groton, Conn. He entered the mercantile business in New York City, acted as a foreign buyer…

Perth, city, Australia

(Encyclopedia) Perth, city (2016 pop. 21,797, Greater Perth 2016 pop. 1,943,858), capital of Western Australia, SW Australia, on the Swan River estuary. Fremantle is Perth's port. Perth is a…

boiler

(Encyclopedia) boiler, device for generating steam. It consists of two principal parts: the furnace, which provides heat, usually by burning a fuel, and the boiler proper, a device in which the heat…

lamprey

(Encyclopedia) lamprey, name for several primitive marine and freshwater jawless fishes of the order Petromyzontiformes. As in the other jawless fish, the hagfish, the adult lamprey retains the…

half-timber house

(Encyclopedia) half-timber house, type of construction of the Middle Ages in N Europe, used chiefly for dwellings. Some French examples date from the 12th cent., and by the 13th cent. the building…

Kreuger, Ivar

(Encyclopedia) Kreuger, IvarKreuger, Ivarēˈvär kr&oomacr;ˈgər [key], 1880–1932, Swedish financier. After studying engineering in Stockholm and engaging in construction enterprises in the United…

Cookeville

(Encyclopedia) Cookeville, city (2020 pop. 34,842), seat of Putnam co., N central Tenn.; inc. 1854. It is a farm trade center that also produces…

cement

(Encyclopedia) cement, binding material used in construction and engineering, often called hydraulic cement, typically made by heating a mixture of limestone and clay until it almost fuses and then…

weathering

(Encyclopedia) weathering, collective term for the processes by which rock at or near the earth's surface is disintegrated and decomposed by the action of atmospheric agents, water, and living things…