| Year | Position | Institution |
| 1929 | University Of Pennsylvania 4 | |
| 1930 | Graduate Student | University Of Pennsylvania 4 |
| 1931 | Biological Abstracts | University Of Pennsylvania 8 |
| 1932 | Assistant In Botany | University Of Pennsylvania 4 |
| 1933 | University Of Pennsylvania 4 | |
| 1934 | Graduate Student | University Of Pennsylvania 4 |
| 1935 | Graduate Student | University Of Pennsylvania 4 |
| 1936 | Research Assistant | Dartmouth College 4 |
| 1937 | Research Assistant In Physiology | Dartmouth College 4 |
| 1938 | Technical Assistant In Zoology | Dartmouth College 4 |
| 1939 | Technical Assistant | Dartmouth College 4 |
| 1940 | Technical Assistant | Dartmouth College 4 |
| 1942 | Technical Assistant | Dartmouth College 8 |
| 1943 | Technical Assistant | Dartmouth College 8 |
| 1944 | Technical Assistant In Zoology | Dartmouth College 8 |
| 1945 | Technical Assistant | Dartmouth College 8 |
| 1946 | Technical Assistant | Dartmouth College 8 |
| 1947 | Dartmouth College 4 | |
| 1949 | Research Associate | Dartmouth College 8 |
| 1950 | Research Associate | Dartmouth College 4 |
| Year | Role | Course |
| 1931 | Instructor | Botany 1931 |
| 1936 | Student | Zoology 1936 |
| 1942 | Instructor | Botany 1942 |
| 1943 | Instructor | Botany 1943 |
| 1944 | Instructor | Botany 1944 |
| 1945 | Instructor | Botany 1945 |
| 1946 | Instructor | Botany 1946 |
| 1947 | Instructor | Botany 1947 |
| 1949 | Field Consultant And Collector | Botany 1949 |
| 1950 | Collector | Botany 1950 |
| Year | Subject | Role |
| 1929 | ||
| 1930 | ||
| 1931 | Beginners | |
| 1932 | Independent | |
| 1933 | Independent | |
| 1934 | Independent | |
| 1935 | Independent | |
| 1937 | Independent | |
| 1938 | Independent | |
| 1939 | Independent | |
| 1940 | Independent | |
| 1942 | Independent | |
| 1943 | Library Readers | |
| 1944 | Independent | |
| 1945 | Independent | |
| 1946 | Independent | |
| 1949 | Indendent |