Columbia Encyclopedia

Search results

500 results found

heat of combustion

(Encyclopedia)heat of combustion, heat released during combustion. In particular, it is the amount of heat released when a given amount (usually 1 mole) of a combustible pure substance is burned to form incombustib...

circuit breaker

(Encyclopedia)circuit breaker, electric device that, like a fuse, interrupts an electric current in a circuit when the current becomes too high. The advantage of a circuit breaker is that it can be reset after it h...

Soddy, Frederick

(Encyclopedia)Soddy, Frederick sŏdˈē [key], 1877–1956, English chemist. He worked under Lord Rutherford at McGill Univ. and with Sir William Ramsay at the Univ. of London. After serving (1910–14) as lecturer...

Peebles, Phillip James Edwin

(Encyclopedia)Peebles, Phillip James Edwin, 1935–, Canadian-American astrophysicist and cosmologist, b. Winnipeg, Man., Ph.D. Princeton, 1962. He spent his entire career as a researcher at Princeton, becoming a f...

Babcock, Stephen Moulton

(Encyclopedia)Babcock, Stephen Moulton mōlˈtən băbˈkŏk [key], 1843–1931, American agricultural chemist, b. Bridgewater, N.Y., grad. Tufts College (B.A., 1866), Univ. of Göttingen, Germany (Ph.D., 1879). He...

Sall, Macky

(Encyclopedia)Sall, Macky, Senegalese political leader. Trained as a geologist, he graduated from Dakar's Cheikh Anta Diop Univ. and also studied in France. A protégé of President Abdoulaye Wade and a member of t...

Reynolds, Albert

(Encyclopedia)Reynolds, Albert, 1935–2014, Irish political leader. A successful business executive, Reynolds won (1977) a seat in the Irish parliament as a member of the Fianna Fáil party. He was minister of pos...

Ramsey, Norman Foster, Jr.

(Encyclopedia)Ramsey, Norman Foster, Jr., 1915–2011, American physicist, b. Washington, D.C., Ph.D. Columbia, 1940. A member of the faculty at Harvard from 1947 and the Higgins professor of physics from 1966 (eme...

Rickover, Hyman George

(Encyclopedia)Rickover, Hyman George, 1900–1986, American admiral, b. Russia. In World War II he served as head of the electrical section of the navy's Bureau of Ships. After the war he was assigned (1946) to the...

World's Columbian Exposition

(Encyclopedia)World's Columbian Exposition, held at Chicago, May–Nov., 1893, in commemoration of the 400th anniversary of the discovery of America by Christopher Columbus. Authorized (1890) by Congress, it was pl...