Affiliations Courses Research 1926InstructorToledo University1929Instructor In ZoologyUniversity Of Pennsylvania1930Instructor In ZoologyUniversity Of Pennsylvania1931Instructor In ZoologyUniversity Of Pennsylvania1932Instructor In ZoologyUniversity Of Pennsylvania1933[position unknown]University Of Pennsylvania1933Instructor In ZoologyUniversity Of Pennsylvania1934Instructor In ZoologyUniversity Of Pennsylvania1935Assistant Professor Of ZoologyUniversity Of Pennsylvania1935Instructor In ZoologyUniversity Of Pennsylvania1936Assistant Professor Of ZoologyUniversity Of Pennsylvania 1926Embryology 1926Student1929Zoology 1929Instructor1930Zoology 1930Instructor1931Zoology 1931Instructor1932Zoology 1932Instructor1933Zoology 1933Instructor1934Zoology 1934Instructor1935Zoology 1935Instructor1936Zoology 1936Instructor 1929[subject unknown][role unknown]1931[subject unknown]Independent1932[subject unknown]Independent1933[subject unknown]Independent1934[subject unknown]Independent1935[subject unknown]Independent1936[subject unknown]Independent