STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 



M. F. Walsh, Director 



BOARD OF 

 NATURAL RESOURCES AND CONSERVATION 

 M. F. Walsh, Chairman 

 Edsox S. Bastix, Geology 

 William A. Noyes, Chemistry 

 John W. Alvord, Engineering 

 William Trelease, Biology 



Henry C. Cowles, Botany 



Charles M. Thompson, Representing 



the President of the University of 



Illinois 



STATE GEOLOGICAL SURVEY DIVISION 

 M. M. Leighton, Chief 



Jeffersons Printing <t Stationery Co. 

 Springfield, Illinois 



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