- 1960[position unknown]
- 1917Fellow In Biology
- 1916Instructor
- 1917Instructor
- 1918Instructor
- 1916Micrologist
- 1917Technician
- 1918Technician
- 1916Assistant Professor Of Biology
- 1960[position unknown]
- 1917Instructor In Biology
- 1918[position unknown]
- 1918Instructor In Biology
- 1919[position unknown]
- 1919Instructor In Biology
- 1920[position unknown]
- 1920Instructor In Biology
- 1921[position unknown]
- 1922[position unknown]
- 1923[position unknown]
- 1937Research Assistant
- 1960[position unknown]
- 1949Graduate Student