...nd made a specialty of chemistry. He was appointed Professor of Physics and Chemistry in the University of Maryland in 1856, and three years later accepted the similar chair in Westminster College, Fulton, Mo. , where he remained two years. In 1867-71 he was Professor of Astronomy in Lehigh University, and from 1871 till his death Professor of Physics in Stevens Institute of Technology, Hoboken, N. J. In 18...