Affiliations Courses Research 1926StudentJohns Hopkins University1929Graduate StudentJohns Hopkins University1930Graduate StudentJohns Hopkins University1931Graduate StudentJohns Hopkins University1927TeacherBaltimore Public Schools 1926Botany 1926Student1927Zoology 1927Student 1929[subject unknown][role unknown]1930[subject unknown][role unknown]1931[subject unknown]Beginners
