Student, George Washington University, 1917-1919; student, University Maryland., 1920-1921.
Science aid, United States Bureau Standards, 1916-1918; manager, editor, The Journal of Heredity, 1922-1952; editor, The Journal of Heredity, 1952-1962; director, Population Reformed Bureau editor, Population Bulletin, 1951-1958; president, editor, Population Bulletin, from 1959. Professor lecturer medical genetics Medical School George Washington University, 1944-1963, lecturer biology, 1946-1963.
Member program committee, organizer section I, Inter-American Conference on Conservation, 1948. Member advisory committee Conservation Foundation. Director Association for Research in Human Heredity, 1947-1950.
Fellow American Association for the Advancement of Science. Member American Eugenics Society (editor Eugenical News 1942, director), American Genetic Association, Genetics Society of America, American Society Human Genetics, American Academy Political and Social Science, Academy Medicine Washington, Washington Academy of Sciences, National Parks Association (trustee), National Association Science Writers, Cosmos Club (Washington), National Press Club.
Married Margaret Brown, August 4, 1921. Children: John Robert, Barbara Alice, Victoria Marian. Married Helen Hall Jennings, February 28, 1944.
Married Annabelle Deumond, August 19, 1946.