Affiliations Courses Research 1937Professor Of BotanyPennsylvania School Of Horticulture1939Associate CuratorAcademy Of Natural Sciences1940Associate CuratorAcademy Of Natural Sciences1935[position unknown]Temple University1938Associate Curator Of Department Of MicroscopyAcademy Of Natural Science Of Philadelphia1949Curator Of LimnologyAcademy Of Natural Science Of Philadelphia1950Curator Of LimnologyAcademy Of Natural Science Of Philadelphia1951Curator Of LimnologyAcademy Of Natural Science Of Philadelphia1957Curator Of LimnologyAcademy Of Natural Science Of Philadelphia1958Curator Of LimnologyAcademy Of Natural Science Of Philadelphia 1949Botany 1949Lecturer1950Botany 1950Lecturer1951Botany 1951Lecturer1957Botany 1957Lecturer1958Botany 1958Lecturer 1935[subject unknown]Independent1937[subject unknown]Independent1938[subject unknown]Independent1939[subject unknown]Independent1940[subject unknown]Independent
