One year later, he was in charge of the Academic Department of the Union School in Morrisville, New York.
The year after he was principal of Morris High School in Leavenworth, Kansas.
In 1909 Stowell left Potsdam to become the founding chair of the new Department of Education in the College of Liberal Arts at the University of Southern California (USC).
Stowell was particularly known for his pamphlets on the origin and cranial nerves of the domestic cat.
Thomas Blanchard Stowell retired in 1919 after a career of 54 years in education.