STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



BOARD OF NATURAL RESOURCES 

 AND CONSERVATION 



Hon. William Sylvester White,, J. D., Chairman 



Laurence L. Sloss, Ph.D., Geology 

 Roger Adams, Ph.D., D.Sc., LL.D., Chemistry 

 Robert H. Anderson, B.S., Engineering 

 Thomas Park, Ph.D., Biology 

 Charles E. Olmsted, Ph.D., Forestry 



Dean William L. Everitt, E.E., Ph.D., D.Eng., 



University of Illinois 



President Delyte W. Morris, Ph.D., 



Southern Illinois University 



STATE GEOLOGICAL SURVEY 



John G. Frye, Ph.D., D.Sg., Chief 



Printed by Authority of State of Illinois, Ch. 127, IRS, Par. 58.25. 



