(Encyclopedia) Ray, Man, 1890–1976, American photographer, painter, and sculptor, b. Philadelphia. Along with Marcel Duchamp, Ray was a founder of the Dada movement in New York and Paris. He is…
VAUGHAN, William Wirt, a Representative from Tennessee; born in LaGuardo (now Martha), Wilson County, Tenn., July 2, 1831; attended the common schools and was graduated from Cumberland…
VAUGHAN, Horace Worth, a Representative from Texas; born near Jefferson, Marion County, Tex., December 2, 1867; attended the common schools of Linden, Cass County, Tex.; studied law; was…
GARY, Julian Vaughan, a Representative from Virginia; born in Richmond, Va., February 25, 1892; attended the public schools; University of Richmond, B.A., 1912 and from its law department, B.L…
(Encyclopedia) Nagin, Ray (Clarence Ray Nagin, Jr.), 1956–, African-American politician, b. New Orleans. A Louisiana cable-television executive before entering politics, Nagin won the 2002 mayoral…
(Encyclopedia) X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is…
(Encyclopedia) X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that…
(Encyclopedia) gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic…
