VAUGHAN, Daniel, scientist, born in Ireland about 1821; died in Cincinnati, Ohio, in April, 1879. He received an excellent education, and possessed great mathematical ability. When about sixteen years of age he came to this country and taught in Bourbon county, Kentucky, meanwhile studying the higher branches of science by himself, but he subsequently settled in Cincinnati, where he devoted himself mainly to astronomy and the larger aspects of natural phenomena. He mastered the German, French, Italian, and Spanish languages, and also ancient and modern Greek. He contributed nearly fifty papers to the proceedings of learned societies and to scientific periodicals at home and abroad. The last work of his life was a series of astronomical articles that were published in the "Popular Science Monthly." He issued in book-form "Popular Physical Astronomy, or an Exposition of Remarkable Celestial Phenomena" (Cincinnati, 1858).