R. A. Broding was graduated from the Uni- 

 versity of Minnesota, B.S.E.E., in 1939. He 

 joined Magnolia Petroleum Company and 

 worked in the geophysical department as an 

 electrical engineer. In 1942 he was a member 

 of the Naval Ordnance Laboratory doing work 

 on magnetic firing devices. He rejoined Mag- 

 nolia Petroleum Company Field Research 

 Laboratories in 1943 and worked on various 

 seismic and electrical prospecting methods. 

 As a research associate he organized and 

 directed the well logging research group which 

 developed magnetic and acoustic well logging 

 instrumentation, including the continuous 

 velocity log. Since 1953 he has been associat- 

 ed with Century Geophysical Corporation as Technical Vice President. 



James G. Crawford attended Park College, 

 the University of Kansas, and the University 

 of New Mexico where he graduated with a 

 B.S. degree in chemical engineering in 1929. 

 He was employed by the U. S. Geological 

 Survey from 1929 to 1946. In 1946 he organ- 

 ized the Chemical & Geological Laboratories, 

 Casper, Wyoming, and is the President of 

 that organization. He is a member of the 

 American Association of Petroleum Geologists, 

 the American Institute of Mining & Metal- 

 lurgical Engineers, the Association of Profes- 

 sional Engineers of Alberta, the Wyoming 

 Geological Association, and is a registered 

 petroleum engineer in Wyoming. He is the 



author of numerous papers on the relation of waters and crude oils to geological 

 formations, and techniques of core analysis. 



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