Cornelia Clapp, PhD. 1896. Joined the faculty of Mt. Holyoke College, where she taught and conducted research until her retirement in 1916.
Oscar Riddle, PhD. 1907. Employed by the Carnegie Institution where he discovered prolactin, the "mother love" hormone in 1932. Founded the National Association of Biology Teachers in 1938.
Wallace Craig, PhD 1909. Craig's work defined the practice of ethology more than any other Whitman student. Craig graduated from Hyde Park High School in Chicago in 1895, and received his undergraduate degree from the University of Illinois.
William Morton Wheeler, PhD. 1892. Wheeler came with Whitman to Chicago from the Marine Biological Laboratory. He was the first to define the ethology as a science in an article in the journal Science in 1902. He later joined the faculty of Harvard University.