REPORT PUBLISHED UNDER STATE GEOLOGICAL COMMISSION 



EDWARD F. DUNNE, Chairman 

 Governor of Illinois 



THOMAS C. CHAMBERLIN, Vice-Chairman 



EDMUND J. JAMES, Secretary 

 President of the University of Illinois 



FRANK W. DE"WOLF, Director 



REPORT PREPARED UNDER STATE GEOLOGICAL COMMISSION 



CHARLES S. DENEEN, Chairman 

 Governor of Illinois 



THOMAS C. CHAMBERLIN, Vice-Chairman 



EDMUND J. JAMES, Secretary 

 President of the University of Illinois 



