Born in Texas in 1903; influence of remote, rural environment on his upbringing and early education. Attended Weatherford Junior College until 1923; studies at University of Chicago, B.A. in 1926, M.A. in 1928, and Ph.D. (formally awarded) in 1937. Comments on courses, teachers and fellow students at Chicago, including J. Harlan Bretz and Rollin T. Chamberlin. Summer research at Amerada Petroleum Corporation (Oklahoma), Illinois State Geological Survey, and U.S. Geological Survey (USGS), late 1920s to early 1930s. First teaching position at Columbia University; research on ground-water motion; involvement in Technocracy Movement, 1930s. Marriage to Miriam Graddy Berry, 1938. Senior analyst on staff of Board of Economic Warfare, 1942-1943; deepening commitment to issue of natural resources. Thoughts on limited interactions between geologists and geophysicists; work in advisory committees on geophysics education, 1930s to 1940s. Theory of scale models, 1937; related research involving strength of solids. Career at Shell Oil Company and Shell Development Company, 1943-1964; directs research laboratory at Shell, perspectives on industry environment for scientific research. Lecture tours to geological, industrial, and policy groups, 1940s to 1960s; involvement in Atomic Energy Commission, National Academy of Sciences, National Research Council, advisory committees. Research with W. W. Rubey on overthrust faulting. Deepening interest in oil and natural gas reserves; responses from officials in petroleum corporations and federal government to his predictions of local, national, and worldwide reserves, 1950s to 1960s. Research geophysicist at USGS, 1964-1976, after retirement from Shell; studies of natural resources and conflicts over his conclusions involving other scientists at USGS. Visiting professorships at Stanford University, Johns Hopkins University, University of California, Berkeley, 1962-1977. Continued involvement in issue of geophysical education at American universities and in studies of natural resources, 1950s to 1970s.