Dave P. Carlton is a veteran of petroleum geophysics. He received his degree in geology from Leland Stanford University in 1915 and immediately went to work as a roughneck for Standard Oil Company of California. After a year he left the oil industry for the mining industry. When World War I broke out, he enlisted in the army, serving overseas with the 27th Engineers. When discharged in 1919, he came back to the petroleum industry to work for Humble in Amarillo. He soon went to Cisco as Division Geologist and in 1922 moved to Houston. In 1924, he was selected to initiate Humble's geophysical efforts. The history of Humble's geophysics is in many ways the history of Dave Carlton. Many of today's outstanding geophysicists outside Humble had their start under the guidance of Dave Carlton.
     Starting from scratch, in less than a year he placed a large-scale refraction crew and a torsion balance crew in the field. From the beginning, Mr. Carlton insisted that Humble have a vigorous geophysical research program. Early he introduced a vital principal into geophysics exploration, namely to proceed from the known to the unknown. The more geophysical pictures of known prospects that we could study, the better he said would we be prepared to interpret geophysical data. A chapter of his history which he particularly cherishes is the contribution of Humble's geophysicists during World War II.
     As important as Dave Carlton's many technical contributions to geophysics are, the many men who have worked with him and for him remember him even more for his personal qualifications. Dave Carlton typifies the terms "gentleman" and "scholar." All those who know him love him. At Humble he is affectionately known as "Uncle Dave." It is a great pleasure to me to have the opportunity today to present to Mr. Carlton this certificate of honorary membership in the Society of Exploration Geophysicists in recognition of his contributions as one of the founders of exploration geophysics. It is an honor which is well deserved.

     W. M. Rust, Jr.