J. F. Sage started in the oil industry in the 

 engineering department of the Prairie Oil and 

 Gas Company at Ranger, Texas, in 1919. In 

 1921 he entered Iowa State College and studi- 

 ed chemical engineering. In 1925 he return- 

 ed to Prairie and in 1928 he installed a geo- 

 chemical laboratory for the company at Inde- 

 pendence, Kansas. The laboratory was moved 

 to Tulsa in 1935 after the merger of Prairie 

 with Sinclair Oil and Gas Company. In 1952 

 he was transferred with the personnel of the 

 laboratory to the Sinclair Production Research 

 Laboratories in Tulsa. He was head of the 

 laboratory from the time of its installation in 

 1928 until 1956, when he was transferred to 



the Exploration Division of the Sinclair Research Laboratories. He is a member 

 of the American Petroleum Institute, the American Institute of Mining and 

 Metallurgical Engineers, the National Association of Chemical Engineers, and 

 the Tulsa Geological Society. 



N. Cyril Schielrz, a native of Iowa, received 

 a B.S. degree in chemical engineering from 

 Marquette University in 1932 and a Ph.D. 

 degree in analytical chemistry from the Uni- 

 versity of Illinois in 1938. He has been a 

 research engineer with Gates Rubber Com- 

 pany, a chemist with the U. S. Department of 

 Agriculture, and a crystallographer with the 

 U. S. Bureau of Reclamation. He has done 

 research work on storage batteries and the 

 chemistry of lead, colloids and emulsions, pen- 

 icillin, rubber chemistry, chemistry of starch 

 and its derivatives, the role of pozzolans in 

 cement, and the identification and structure 

 of clays. At present, he is Associate Professor 

 of Metallurgy at the Colorado School of Mines. 



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