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Rose, Gustav

(Encyclopedia)Rose, Gustav go͝osˈtäf rōˈzə [key], 1798–1873, German mineralogist. He served as professor at the Univ. of Berlin from 1839. Noted especially as a crystallographer, he advanced the scientific ...

Barkla, Charles Glover

(Encyclopedia)Barkla, Charles Glover glŭˈvər bärˈklə [key], 1877–1944, English physicist. He was professor of natural philosophy at Edinburgh from 1913. For his discovery of the characteristic X rays of ele...

Staël, Nicholas de

(Encyclopedia)Staël, Nicholas de nēkôläˈ də stäl [key], 1914–55, French painter, b. St. Petersburg, Russia. Reared in Brussels, he traveled extensively before settling in France in 1940. De Staël evolved ...

Barton, Benjamin Smith

(Encyclopedia)Barton, Benjamin Smith, 1766–1815, American physician and botanist, b. Lancaster, Pa., studied at the College of Philadelphia, at Edinburgh, and at Göttingen (M.D., 1789). He taught at the College ...

color-field painting

(Encyclopedia)color-field painting, abstract art movement that originated in the 1960s. Coming after the abstract expressionism of the 1950s, color-field painting represents a sharp change from the earlier movement...

Lutosławski, Witold

(Encyclopedia)Lutosławski, Witold, 1913–94, Polish composer, b. Warsaw, studied Univ. of Warsaw, Warsaw Conservatory. His early works were mainly neoclassical and often included elements from Polish folk music, ...

law of simple multiple proportions

(Encyclopedia)law of simple multiple proportions, in chemistry, the statement that when two or more elements form more than one compound, the ratio of the weights of one element that combine with a given weight of ...

moscovium

(Encyclopedia)moscovium mŏskōˈvēəm [key], artificially produced radioactive chemical element; symbol Mc; at. no. 115; mass number of most stable isotope 288; m.p., b.p., sp. gr., and valence unknown. Situated ...

Alexander of Hales

(Encyclopedia)Alexander of Hales, d. 1245, English scholastic philosopher, called the Unanswerable Doctor by his fellow scholastics. He was a Franciscan and a lecturer at the Univ. of Paris. His Summa universae the...

chord, in music

(Encyclopedia)chord, in music, two or more simultaneously sounding pitches. In tonal music the fundamental chord is called the triad. It consists of three pitches, two a perfect fifth apart and a third pitch a majo...