Pennsylvania Academy of Science Presidents 1925-1931
Pennsylvania Academy of Science Presidents 1931-1937
Pennsylvania Academy of Science Presidents 1937-1943
Pennsylvania Academy of Science Presidents 1943-1949
Pennsylvania Academy of Science Presidents 1949-1955
Pennsylvania Academy of Science Presidents 1955-1961
Pennsylvania Academy of Science Presidents 1961-1968
Pennsylvania Academy of Science Presidents 1968-1980
Pennsylvania Academy of Science Presidents 1980-1992
Pennsylvania Academy of Science Presidents 1992-2004