American chemist; born at Hoboken, N. J., May 26, 1867; educated in the public schools of New York, the real-gymnasium of Carlsruhe, and the universities of Berlin and Göttingen. Shortly after his return to the United States he became connected with the University of Chicago, and has served it in turn as instructor, assistant professor, and associate professor of chemistry. He has been a frequent contributor to the chemical periodicals of the United States and Germany, articles by him having appeared in the "American Chemical Journal," "Journal of the American Chemical Society," and "Berichte der Deutschen Chemischen Gesellschaft," 1892-1903.