In 1906 he became professor at Delft University and this time he got enough resources and students to make his work successful. The same year he became member of the Royal Netherlands Academy of Arts and Sciences.
In 1906, he took on the role of professor at Delft University with adequate funding and student support, which led to his work being successful. Simultaneously, that same year, he was elected a member of the Royal Netherlands Academy of Arts and Sciences.