sentences:  His next charge was at the Falling Spring Presbyterian Church at Chambersburg, Pennsylvania, where he remained four years.A throat ailment forced him to give up preaching and he went to his alma mater as an instructor in logic in 1891.He received a Ph.D. degree in 1893 with a dissertation on "The Relation of Ethics to Jurisprudence," became assistant professor in 1894, and Stuart Professor of Logic in 1907.