DROWN, THOMAS MESSINGER, an American scientist; born in Philadelphia, March 19, 1842. He was graduated at the University of Pennsylvania in 1862, studying later at Yale, Harvard, and Heidelberg. He was Professor of Chemistry at Lafayette College, 1874-81; Massachusetts Institute of Technology, 1885-95; was president of Lehigh University, 1895-1904. He died Nov. 16, 1904.