George Ellery Hale, Associate Professor of Astronomy, Director of Yerkes Observatory.
Thomas Chrowder Chamberlin, came from the presidency of the University of Wisconsin, appointed Professor of Geology.
James Merle Coulter, Coulter supervised the research of Henry Chandler Cowles, whose dissertation on the botany of the Indiana Dunes started the science of ecology on its way.
Henry Chandler Cowles, appointed to the Department of Botany after receiving his PhD in 1896, later head of the department of Botany. Cowles retired in 1934 and died in 1939.
Albert A. Michelson, from Clark University, Professor of Physics, Nobel laureate, 1907. Albert A. Michelson, recognized for his extensive studies of the speed of light, received a Nobel Prize in 1907 not for discovering the speed of light but for his optical precision instruments and the spectroscopic and metrological investigations carried out with their aid.