WETHERILL, Charles Mayer, chemist, born in Philadelphia, Pennsylvania, 4 November, 1825; died in South Bethiehem, Pennsylvania, 5 March, 1871. He was graduated at the University of Pennsylvania in 1845, and then worked for a year at practical chemistry in the laboratory of James C. Booth in Philadelphia. In 1847 he went abroad and studied for eight months at the College de France in Paris, after which he followed organic chemistry under Justus yon Lie-big at the University of Giessen, where he received the degree of Ph. D. in 1848. During 1849-'52 he was occupied in chemical investigations at his private laboratory in Philadelphia, and gave a course of lectures on chemistry before the Franklin institute. Subsequently he held no public office until his appointment as chemist to the agricultural department in Washington, where he remained for about a year. In 1866 he was chosen to the professorship of chemistry in Lehigh university, which chair he filled until his death. His chemical books were bequeathed to the library of that institution. The honorary degree of M. D. was conferred on him by the New York medical college in 1853. Dr. Wetherill was a member of the American philosophical society and other scientific bodies here and abroad. His investigations are described in forty papers in the " Journal of the Franklin Institute," "American Journal of Science," and in the transactions of societies of which he was a member. His only systematic treatise was on "The Manufacture of Vinegar" (Philadelphia, 1860).