Original oil and gas trade magazine vintage ad for GENERAL GEOPHYSICAL COMPANY, Chapter Six in the Fascinating Story of the Search for Oil. Features art work by Hal Jones. Has an excerpt from E. DeGoyler's book titled, "The Development of the Art of Prospecting," and from a report by Dr. J. Brian Eby. Unique 1951 old oilfield petroleum drilling industry magazine advertisement would look sensational matted and framed. Nice graphics. Approximate size 9 x 12 inches.