After five years in Heidelberg he moved to a chair at the University of Freiburg where he taught from 1870 until 1874 when he was appointed to the chair at the University of Tübingen where he succeeded Hankel .
Pagkatapos ng limang taon sa Heidelberg siya inilipat sa isang upuan sa University of Freiburg kung saan siya nagtuturo mula 1870 hanggang 1874 kung kailan siya ay hihirangin upang angkinin ang upuan sa University of Tübingen kung saan siya Tagumpay Hankel.