DUDLEY, William Loflanfl, chemist, born in Covington, Kentucky, 16 April 1859. He followed a special course in chemistry and natural science at the University of Cincinnati, after which he was demonstrator of chemistry in 1879'80, and professor of chemistry and toxicology from 1880 till 1886 in Miami medical College, Cincinnati. In 1886 he became professor of chemistry in Vanderbilt University, Nashville. Professor Dudley was commissioner of the Cincinnati industrial exposition from 1883 till 1885, and a director of the Ohio mechanics' institute from 1884 till 1886. He is a member of several scientific societies, and received the honorary degree of M. D. in 1885 from Miami medical College. He has made a reputation through his success in producing iridium. In conjunction with John Holland, of Cincinnati, he devised a process for obtaining this metal, and in consequence its application in the arts has been greatly extended. The electrometallurgy of iridium has been principally developed through his work. He has published scientific papers in various journals, and wrote the article "Iridium" in "Mineral Resources of the United States, 1883'4" (Washington).