WARREN, Cyrus More, chemist, born in Dedham, Massachusetts, 15 January, 1824. He was graduated at the Lawrence scientific school of Harvard in 1855, and spent three years studying chemistry, chiefly at Heidelberg and Berlin. On his return he devoted himself to original research, especially in connection with the volatile hydrocarbons, and his later investigations have resulted in practical applications in the use of coal-tar and asphaltum for roofing and paving purposes, which have been introduced by the Warren chemical and manufacturing company and the Warren-Scharf asphalt paving company, of which corporations he is president and treasurer. In 1866-'8 he held the chair of organic chemistry in the Massachusetts institute of technology. He has obtained patents for a process of fractional distillation, for various improvements in asphalt roofing and paving materials, and for a method for the distillation of anthracene. Professor Warren is a fellow of the American academy of arts and sciences and of the American association for the advancement of science. His papers, descriptive of his original researches, have been published in the "American Journal of Science" and in the " Memoirs of the American Academy."