Columbia Encyclopedia

Search results

500 results found

fuller's earth

(Encyclopedia)fuller's earth, mineral substance characterized by the property of absorbing basic colors and removing them from oils. It is composed mainly of alumina, silica, iron oxides, lime, magnesia, and water,...

fluorite

(Encyclopedia)fluorite flo͞oˈərspär [key], mineral appearing in various colors, e.g., green, yellow-brown, rose, and red. Chemically, it is calcium fluoride, CaF2. Its crystals, commonly cubic, are transparent ...

Morgan, Edmund Sears

(Encyclopedia)Morgan, Edmund Sears, 1916–2013, U.S. historian, b. Minneapolis. After receiving his Ph.D. from Harvard in 1942, he taught at the Univ. of Chicago (1945–46) and at Brown (1946–55) before becomin...

Munro, Wilfred Harold

(Encyclopedia)Munro, Wilfred Harold, 1849–1934, American historian and educator, b. Bristol, R.I.; brother of Dana Carleton Munro. From 1870 to 1871 he was a master at De Veaux College, Niagara Falls, N.Y., where...

okapi

(Encyclopedia)okapi ōkăpˈē [key], nocturnal ruminant mammal, Okapia johnstoni, of the giraffe family. It inhabits the almost sunless rain forests of the upper Congo and feeds on leaves. Its shape is reminiscent...

McDougall, William, Canadian statesman

(Encyclopedia)McDougall, William, 1822–1905, Canadian leader in the movement for Canadian confederation, b. Ontario. He was elected (1858) to the Legislative Assembly, and in 1864 he entered the “great coalitio...

Mandelstam, Osip Emilyevich

(Encyclopedia)Mandelstam, Osip Emilyevich ôˈsĭp ĕmyēlˈyəvĭch mänˈdĭlstəm [key], 1892–1938, Russian poet. Mandelstam was a leader of the Acmeist school. He wrote impersonal, fatalistic, meticulously co...

logwood

(Encyclopedia)logwood, small, thorny tree (Haematoxylon campechianum) of the family Leguminosae (pulse family) native to tropical America and introduced into other tropical regions. The brown-red heartwood is the s...

Kosterlitz, John Michael

(Encyclopedia)Kosterlitz, John Michael, 1943–, British physicist, b. Scotland, Ph.D. Oxford, 1969. He was on the faculty at the Univ. of Birmingham, England, from 1974 to 1982, when he became a professor at Brown...

Watson, Thomas John, Jr.

(Encyclopedia)Watson, Thomas John, Jr., 1914–93, American industrialist, b. Dayton, Ohio. The son of Thomas John Watson, Sr., the founder of the International Business Machines Corp. (IBM), he joined the family b...