Columbia Encyclopedia

Search results

500 results found

diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

dog racing

(Encyclopedia)dog racing, trials of speed between dogs. Now contested on oval tracks, the sport developed from the ancient practice of coursing, in which specially trained dogs chase game animals in the open field....

Drake, Joseph Rodman

(Encyclopedia)Drake, Joseph Rodman, 1795–1820, American poet and satirist, b. New York City. Under the name “The Croakers,” he and his friend Fitz-Greene Halleck wrote a series of light satirical verses for t...

Commonwealth Fund

(Encyclopedia)Commonwealth Fund, foundation established (1918) by Anna M. Harkness, wife of Stephen V. Harkness, an early Standard Oil investor, “for the welfare of mankind.” Its headquarters are in New York Ci...

De Bary, Heinrich Anton

(Encyclopedia)De Bary, Heinrich Anton hīnˈrĭkh änˈtōn də bärēˈ [key], 1831–88, German botanist. He was professor at the universities of Freiburg in Breisgau (1855–66) and Halle (1867–72) and first r...

Atholston, Hugh Graham, 1st Baron

(Encyclopedia)Atholston, Hugh Graham, 1st Baron ăthˈəlstən [key], 1848–1938, Canadian newspaper publisher. He was the founder and proprietor (1869) of the evening paper the Montreal Star, which became Canada'...

luxury tax

(Encyclopedia)luxury tax, levy on articles that are not essential to a normal standard of living. Such taxes may be imposed strictly for revenue purposes or they may be intended to discourage consumption of certain...

Rogers, Henry Huttleston

(Encyclopedia)Rogers, Henry Huttleston, 1840–1909, American financier, b. Fairhaven, Mass. After he moved (1860) to Pennsylvania, he entered the oil business, experimented in the refining of petroleum, and, in pa...

Agricola, Georgius

(Encyclopedia)Agricola, Georgius gāˈôrk bouˈər [key], 1494–1555, German physician and scientist, known as the father of mineralogy. He was a pioneer in physical geology and the first to classify minerals sci...

Berni, Francesco

(Encyclopedia)Berni, Francesco fränchāsˈkō bĕrˈnē [key], 1497?–1535, Italian humorous poet, a priest. He was noted for his burlesque capitoli, light, often ribald verses in terza rima. He revised Boiardo's...