G. Frederick Shepard, General American Oil Company of Texas, Dallas, 



Texas 

 L. L. Sloss, Department of Geology, Northwestern University, Evanston, Illinois 

 W. Alan Stewart, Department of Geology, Colorado School of Mines, Golden, 



Colorado 

 Harrison E. Stommel, Department of Geophysics, Colorado School of Mines, 



Golden, Colorado 

 E. F. Stratton, Schlumberger Oil Well Surveying Corporation, Houston, Texas 

 H. F. Sutter, Baroid Sales Division, National Lead Company, Houston, Texas 

 Wilfred Tapper, Halliburton Oil Well Cementing Company, Duncan, Oklahoma 

 John D. Todd, Consulting Petroleum Geologist, Houston, Texas 

 Paul D. Torrey, Lynes Incorporated, Houston, Texas 

 R, Maurice Tripp, Consulting Engineer, South Lincoln, Massachusetts 

 Warren R. Wagner, Department of Geology, Colorado School of Mines, Golden, 



Colorado 

 W. A. Wallace, Halliburton Oil Well Cementing Company, Houston, Texas 



