Columbia Encyclopedia

Search results

500 results found

patina

(Encyclopedia)patina pătˈənə [key], coating of carbonate of copper on articles of copper or bronze, formed after long exposure to a moist atmosphere or burial in the earth. Although commonly green, patina varie...

Saint-Omer

(Encyclopedia)Saint-Omer săNtômĕrˈ [key], city (1990 pop. 15,304), Pas-de-Calais dept., N France, in Flanders, on the Aa River. The chief manufactures are metals, textiles, paper, and beer. The city grew around...

Sabatier, Paul, French organic chemist

(Encyclopedia)Sabatier, Paul, 1854–1941, French organic chemist, D.Sc. Collège de France, 1880. He joined the faculty at the Univ. of Toulouse in 1882 and taught there until he retired in 1930. Sabatier was a co...

Steubenville

(Encyclopedia)Steubenville sto͞oˈbənvĭl [key], city (1990 pop. 22,125), seat of Jefferson co., E central Ohio, on the Ohio River; laid out c.1797, inc. as a city 1851. Its once significant steel and coking indu...

brazing

(Encyclopedia)brazing, method of joining metal parts using nonferrous filler metals with high melting points such as copper, silver, and aluminum alloys. Brazing differs from soldering (see solder) by using a highe...

tantalum

(Encyclopedia)tantalum tănˈtələm [key] [from Tantalus], metallic chemical element; symbol Ta; at. no. 73; at. wt. 180.94788; m.p. 2,996℃; b.p. 5,400±100℃; sp. gr. 16.65 at 20℃; valence +2, +3, +4, or +5....

bismuth

(Encyclopedia)bismuth bĭzˈməth [key] [Ger. Weisse Masse=white mass], metallic chemical element; symbol Bi; at. no. 83; at. wt. 208.98040; m.p. 271.3℃; b.p. about 1,560℃; sp. gr. 9.75 at 20℃; valence +3 or ...

Kamerlingh Onnes, Heike

(Encyclopedia)Kamerlingh Onnes, Heike hīˈkə käˈmərlĭng ônˈəs [key], 1853–1926, Dutch physicist. He was, from 1882, professor of physics at the Univ. of Leiden. He made important studies of the propertie...

Forlì

(Encyclopedia)Forlì fōrlēˈ [key], city, capital of Forlì prov., Emilia-Romagna, N central Italy. It is...

Newport, city, Wales

(Encyclopedia)Newport, Welsh Casnewydd, city and unitary authority (1991 pop. 129,900), 74 sq mi (191 sq km), SE Wales, on the Usk River. Lumber, tea, automobiles, electronics, semiconductors, and aircraft are made...