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Townsend, Francis Everett

(Encyclopedia)Townsend, Francis Everett tounˈzənd [key], 1867–1960, American reformer, leader of an old-age pension movement, b. Fairbury, Ill., grad. Univ. of Nebraska medical school, 1903. He practiced medici...

Zemurray, Samuel

(Encyclopedia)Zemurray, Samuel, 1877–1961, American business executive, b. Russia as Schmuel Zmuri; he Americanized his name early in the 20th cent. His nearly penniless family emigrated in 1891 and soon settled ...

Ross, John

(Encyclopedia)Ross, John, whose name in Cherokee is Kooweskoowe ko͞oˌwĭsˌko͞owēˈ [key], 1790–1866, Native American chief, b. near Lookout Mt., Tenn., of Scottish and Cherokee parents. He was educated at Ki...

repetitive stress injury

(Encyclopedia)repetitive stress injury or repetitive strain injury (RSI), injury caused by repeated movement of a particular part of the body. Often seen in workers whose physical routine is unvaried, RSI has becom...

separator, cream

(Encyclopedia)separator, cream, dairy machine used to separate fresh whole milk into cream and skim milk. Formerly the separation was made by the gravity method, allowing the cream to rise to the top of a pan and t...

hurricane

(Encyclopedia)CE5 View into the eye of a hurricane showing the structure of the surrounding cloud wall hurricane, tropical cyclone in which winds attain speeds greater than 74 mi (119 km) per hr. Wind speeds gu...

superconductivity

(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...

ventilation

(Encyclopedia)ventilation, process of supplying fresh air to an enclosed space and removing from it air contaminated by odors, gases, or smoke. Proper ventilation requires also that there be a movement or circulati...

hydrogen bomb

(Encyclopedia)hydrogen bomb or H-bomb, weapon deriving a large portion of its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb, uranium or plutonium is split into lighter elements that togethe...

circulatory system

(Encyclopedia)CE5 Circulatory system circulatory system, group of organs that transport blood and the substances it carries to and from all parts of the body. The circulatory system can be considered as compose...