May 14 1925
Godshalk, Clarence E.
August 9 1927
Teuscher, Henry
October 15 1928
July 15 1930
September 24 1931
Kammerer, E. Lowell
May 9 1933
July 15 1934
October 10 1935
December 1936
February 1938
April 1939
July 1940
October 1941
January 1943
July 1944
Watts, May Theilgaard
February 1946
July 1947
November 1948
February 1950
June 1951
September 1952
December 1954
May 1955
August 1956
November 1957
February 1959
June 1960
November 1961
March – April 1963
September 1964
April 4 1935
March 2 2000
1942
September 21 – December 20 1975
June 21 – September 20 1979
June 21 – September 20 1983