(Encyclopedia) scheelitescheeliteshāˈlīt, shēˈ– [key], heavy white or yellow mineral, calcium tungstate, CaWO4, crystallizing in the tetragonal system. It is found in granite pegmatites, in contact-…
(Encyclopedia) whiting, white, powdery substance, prepared by grinding chalk or some other source of calcium carbonate. When mixed with linseed oil it forms putty, and with water and several other…
(Encyclopedia) Beltsville swine, two breeds of swine developed at the agricultural research center of the U.S. Department of Agriculture in Beltsville, Md. The breeds are designated Beltsville No. 1…
(Encyclopedia) Nakamura, Shuji, 1954–, Japanese physicist and electronics engineer, grad. Univ. of Tokushima (D.Eng., 1994). Nakamura joined the Nichia Corporation in 1977, and it was there that he…
(Encyclopedia) daisy [O.E.,=day's eye], name for several common wildflowers of the family Asteraceae (aster family). The daisy of literature, the true daisy, is Bellis perennis, called in the United…
(Encyclopedia) English sparrow or house sparrow, small bird, Passer domesticus, common throughout most of the world. English sparrows are 4 to 7 in. (10–18 cm) long, with short, stout bills. The male…
(Encyclopedia) McKim, Charles Follen, 1847–1909, American architect, b. Chester co., Pa., studied (1867–70) at the École des Beaux-Arts. He was one of the founders of the firm of McKim, Mead, and…
(Encyclopedia) spiritual, a religious folk song of American origin, particularly associated with African-American Protestants of the southern United States. The African-American spiritual,…
RAINBOWSPLITTING LIGHTSUNSETCOLOUR SPECTRUMSEEING COLOURFIND OUT MOREOn a sunny day, the world seems light and colourful because our eyes are able to see differences in the wavelengths of light…
