- 1895Professor Of Astronomy And Biology
- 1935Instructor In Biology
- 1895Student
- 1932Assistant Professor Of Biology
- 1933[position unknown]
- 1933Assistant Professor Of Biology
- 1934Assistant Professor Of Biology
- 1935Assistant Professor Of Biology
- 1936Assistant Professor Of Biology
- 1937Assistant Professor Of Biology
- 1939Associate Professor Of Biology
- 1958Instructor
- 1966[position unknown]
- 1958[position unknown]