- 1916[position unknown]
- 1914[position unknown]
- 1915Lackland Research Fellow
- 1912Director
- 1913Director
- 1915Director
- 1916Director
- 1917Director
- 1918[position unknown]
- 1918Director
- 1919[position unknown]
- 1921[position unknown]
- 1921Director
- 1922[position unknown]
- 1922Director
- 1923[position unknown]
- 1924[position unknown]
- 1925[position unknown]
- 1926[position unknown]
- 1927[position unknown]
- 1928[position unknown]
- 1929[position unknown]
- 1930[position unknown]
- 1931[position unknown]
- 1932[position unknown]
- 1934[position unknown]
- 1935[position unknown]
- 1936[position unknown]
- 1937[position unknown]
- 1914Physiologist In Charge Of Graduate Laboratory And Professor Of Plant Physiology
- 1925[position unknown]
- 1926[position unknown]
- 1914Director
- 1987[position unknown]
- 1925[position unknown]
- 1926[position unknown]
- 1927[position unknown]
- 2010[position unknown]