Original oil and gas trade magazine vintage ad for GENERAL GEOPHYSICAL COMPANY, was located in the Gulf Building, Houston, TX. Steadfast Major General Greenville Dodge determined that the Union Pacific Railroad would join the Central Pacific at Promontory Point. Determination is important to the purpose of geophysical work too. This unique 1953 old one page oilfield petroleum drilling industry magazine advertisement would display beautifully matted and framed. Nice graphics.