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Coblentz, William Weber

(Encyclopedia)Coblentz, William Weber kōˈblĕnts [key], 1873–1962, American physicist, b. North Lima, Ohio, grad. Case School of Applied Science (B.S., 1900) and Cornell (Ph.D., 1903). From 1905 to 1945 he was ...

celluloid

(Encyclopedia)celluloid [from cellulose], transparent, colorless synthetic plastic made by treating cellulose nitrate with camphor and alcohol. Celluloid was the first important synthetic plastic and was widely use...

mortar, in building

(Encyclopedia)mortar, in building, mixture of lime or cement with sand and water, used as a bedding and adhesive between adjacent pieces of stone, brick, or other material in masonry construction. Lime mortar, a co...

naphthol

(Encyclopedia)CE5 naphthol năfˈthôl [key], C10H7OH, either of two crystalline monohydric alcohols. The naphthols are position isomers, differing in the location of the hydroxyl group, –OH, on the carbon ske...

Wilson, Benjamin

(Encyclopedia)Wilson, Benjamin, 1721–88, English portrait painter and electrician who opposed Benjamin Franklin's theory of positive and negative electricity. Instead, Wilson supported Newton's gravitational-opti...

liquid crystal

(Encyclopedia)liquid crystal, liquid whose component particles, atoms or molecules, tend to arrange themselves with a degree of order far exceeding that found in ordinary liquids and approaching that of solid cryst...

Harvey, George Brinton McClellan

(Encyclopedia)Harvey, George Brinton McClellan, 1864–1928, American journalist and diplomat, b. Peacham, Caledonia co., Vt. After a career in journalism and insurance, he became involved in the construction and a...

Firestone, Harvey Samuel

(Encyclopedia)Firestone, Harvey Samuel, 1868–1938, American industrialist, manufacturer of rubber products, b. Columbiana co., Ohio. The son of a prosperous farmer, Harvey Firestone began to manufacture rubber ti...

Cavan, county, Ireland

(Encyclopedia)Cavan kăvˈən [key], county, 730 sq mi (1,891 sq km), N Republic of Ireland. The county sea...

Kopp, Hermann Franz Moritz

(Encyclopedia)Kopp, Hermann Franz Moritz hĕrˈmän fräntz mōˈrĭts kôp [key], 1817–92, German physical chemist and historian of chemistry. His research concerned the connection between the physical propertie...