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Douglas, cities, United States

(Encyclopedia)Douglas. 1 City (2020 pop. 16,534), Cochise co., SE Ariz., at the Mexican border; inc. 1905. The mining and smelting of copper have been ...

taconite

(Encyclopedia)taconite, low-grade iron ore, a flintlike rock usually containing less than 30% iron. Resistant to drilling and to the extraction of its contained metal, the rock was long considered worthless. Experi...

Lempa

(Encyclopedia)Lempa lāmˈpä [key], river, c.200 mi (320 km) long, rising in Guatemala and flowing S through Honduras into El Salvador, then generally S to the Pacific Ocean. An important stream, it waters the fer...

Thompson , river, Canada

(Encyclopedia)Thompson, river, 304 mi (489 km) long, formed by the junction of the North Thompson and the South Thompson rivers at Kamloops, S British Columbia, and flowing W and S to the Fraser River at Lytton. Th...

fatigue, in engineering

(Encyclopedia)fatigue, in engineering, microscopic cracking of materials, especially metals, after repeated applications of stress. Fissures may be formed within pieces of metal during their manufacture when, while...

Grumman, Leroy Randle

(Encyclopedia)Grumman, Leroy Randle, 1895–1982, American aviation pioneer and aerospace executive, b. Huntington, N.Y. After graduating from Cornell (1916), he joined the U.S. navy, where he served as a flight in...

Thomasville

(Encyclopedia)Thomasville. 1 City (1990 pop. 17,457), seat of Thomas co., SW Ga., near the Fla. line; inc. 1831. It is a farm trade center, with a large fresh-vegetable market. Manufactures include lumber, clothing...

Ipiranga

(Encyclopedia)Ipiranga ēpērängˈgə [key], stream flowing near the city of São Paulo, Brazil. On its banks the regent Pedro (later Emperor Pedro I) issued the Grito do Ipiranga, the declaration of the independe...

Hermaphroditus

(Encyclopedia)Hermaphroditus hərmăfrədīˈtəs [key], in Greek mythology, beautiful son of Hermes and Aphrodite. He scorned the nymph Salmacis, who prayed that they might never be separated. When Hermaphroditus ...

Malheur

(Encyclopedia)Malheur məlo͝orˈ [key], river, c.165 mi (270 km) long, rising in several branches in the Strawberry Mts., E Oregon. The united stream flows generally NE to the Snake River at Ontario. There are flo...