Geologist. A.B., Beloit College, 1866; A.M. 1869. Ph. D., University of Michigan and University of Wisconsin, 1882. Lecturer, Beloit College, 1882-1887; professor, 1873-1882. Professor, Columbian University, 1885-1887. President, University of Wisconsin, 1887-1892. Professor and head of the Department of Geology, University of Chicago, 1892-1919. Geologist to Peary Expedition, 1894.