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Wines, Enoch Cobb

(Encyclopedia)Wines, Enoch Cobb, 1806–79, American clergyman and prison reformer, b. Hanover, N.J. After a varied career as a schoolmaster and preacher he became (1861) secretary of the Prison Association of New ...

echo, in acoustics

(Encyclopedia)echo, reflection of a sound wave back to its source in sufficient strength and with a sufficient time lag to be separately distinguished. If a sound wave returns within 1⁄10 sec, the human ear is in...

Young, Thomas

(Encyclopedia)Young, Thomas, 1773–1829, English physicist, physician, and Egyptologist. He established (1799) a medical practice in London and was elected (1811) to the staff of St. George's Hospital there. His l...

Fundy, Bay of

(Encyclopedia)Fundy, Bay of, large inlet of the Atlantic Ocean, c.170 mi (270 km) long and 30 to 50 mi (50–80 km) wide, between New Brunswick and SW Nova Scotia, Canada. It is famous for its tide and tidal bore; ...

Moskenstraumen

(Encyclopedia)Moskenstraumen mālˈstrəm [key], tidewater whirlpool in the Lofoten Islands, NW Norway. Formed when tidal currents flow through coastal fjords and a maze of small islands, it is c.2.5 mi (4 km) wide...

Marmara, Sea of

(Encyclopedia)Marmara, Sea of, or Sea of Marmora, c.4,430 sq mi (11,474 sq km), NW Turkey, between Europe in the north and Asia in the south. The Sea of Marmara, c.175 mi (280 km) long and 50 mi (80 km) wide, is co...

Grimaldi, Francesco Maria

(Encyclopedia)Grimaldi, Francesco Maria fränchāsˈkō märēˈä grēmälˈdē [key], 1618?–1663, Italian physicist and mathematician. A Jesuit and professor at Bologna, he studied in detail and named the dark ...

Arago, Dominique François

(Encyclopedia)Arago, Dominique François dômēnēkˈ fräNswäˈ ärägōˈ [key], 1786–1853, French physicist and astronomer. He is noted for his discoveries in magnetism and optics as well as for his astronomi...

short waves

(Encyclopedia)short waves, radio waves whose frequencies range from about 3 to 25 megahertz (Mhz), corresponding roughly to the high-frequency band (see radio frequency). When they impinge on certain layers of the ...

windsurfing

(Encyclopedia)windsurfing, also called boardsailing or sailboarding, water sport that employs a board-and-sail device and combines elements of sailing and surfing. The sailboard was first developed in 1964 by boate...