Party affiliation: Democrat
Assistant superintendent Harvard Botanic Garden, Soledad, Cienfuegos, Cuba, 1925-1926. Assistant zoology genetics Harvard, 1926-1927. Assistant geneticist Connecticut Agriculture Experiment Station, New Haven, 1927-1935, research associate, 1935-1948.
Senior geneticist Brookhaven National Laboratory, Upton, Long Island, 1948-1955. Miller professor biology University of Virginia, Charlottesville, 1965-1970, professor emeritus, 1970-1982, director Blandy Experimental Farm, University of Virginia, Charlottesville, 1955-1965, helped install 1st Company 60 source continuous radiation of growing plants to induce mutations. Consultant International Atomic Energy Agency, Vienna, 1964-1965.
Invitation speaker 7th International Genetics Congress, Edinburgh, Scotland, 1939. Chairman Northeastern Corn Improvement Conference, 1948-1949. Consultant on atomic energy in South, Southern Regional Education Board, Atlanta, 1956-1957.
Member food and agricultural study group National Academy Sciences, 1957-1960. Technical adviser United States delegation Geneva Conference Peace Time Uses Atomic Energy, 1955. Fulbright awards committee, 1955-1959.
National Research Council commission on plant breeding, 1957-1963. Bio-Astronautics committee, 1959-1960. Nuclear radiation and food agriculture committee, 1960-1965.
United Nations atomic energy adviser to Government Thailand, 1964-1965. Director National Colonial Farm, Accokeek, Maryland., 1966-1970.
Served as private S.A.T.C., 1918. Fellow of the American Association for the Advancement of Science. Member American Genetic Association (Vice-President 1967, president 1968-1969), Genetics Society American (secretary-treasurer 1950, secretary 1951-1952, vice president 1953, chairman awards committee IX International Genetics Congress, Bellagio, Italy, 1953), American Institute Biological Sciences (chairman publications committee 1952-1953), American Society Agronomy, American Society Naturalists, Sigma Xi, Phi Sigma, Alpha Gamma Rho, Alpha Zeta, Phi Kappa Phi, Phi Delta Kappa.
Born April 24, 1900