In 1980, he was appointed as a professor at the university until 1996.
It was also the first to appoint a woman as a full professor.
He was appointed as professor of the Academy in 1907.
In 1937 he was appointed as professor of history at the same institution.
Chicago appointed him as a professor of human ecology in 1960.
Once appointed as a professor, the next step is being awarded tenure.
In 2005, he was appointed as a full professor.
In 1883 he was appointed as a full professor and continued to teach the physical geography classes.
In 1911 he was appointed as an associate professor.
In 1803, he was appointed as a professor of physics at his local lyceum.