Io E. DEGOLYER 
was the first to be detailed by this method. The dip method has been 
used chiefly for detailing known salt domes in the Gulf Coast and is 
today almost the only method of seismic exploration being used in that 
area. It is used as an exploratory metho | in a search for the so-called 
deep domes. The Valentine or Harang dome, Louisiana, is the only 
dome actually discovered by the method which has been proved by 
the drill to be an actual salt dome, though many structures, of the 
so-called ‘“‘deep-seated” type have been found by it and, with deeper 
drilling, the salt cores will probably be found. 
Such in brief-are the outstanding events in the early history of 
applied geophysics in the oil industry as they have come to the knowl- 
edge of the writer. The technique has developed rapidly and is still 
being improved substantially. Much remains to be done. It is a 
notable fact that, since the discovery of the great East Texas field 
some five years ago, notwithstanding that exploratory drilling of 
geophysical structures has been at a maximum, actual discovery of 
oil in the United States has not been able to keep pace with consump- 
tion. This condition suggests that, without the aid of geophysics, 
the industry would have fallen even further in arrears. The aid of the 
geophysicist is and must be the hope of the future in further search 
for oil. 
