STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDICATION 



A. M. Shelton. Director 



BOARD OF 



NATURAL RESOURCES AND CONSERVATION 

 A. M. Shelton, Chairman 



William Tkelease, Biology 

 John M. Coulter, Forestry 

 Edson S. Bastin, Geology 

 William A. Notes, Chemistry 



John W. Altord, Engineering 

 Kendhic C. Baecock. Tleprcsenting the 



President of the University of IIH 



nois 



NATURAL HISTORY SURVEY DIVISION 

 Stephen A. Forbes, Chief 



SCIINKPP «t BaunKS. I'liliNTKKa 



Sprinofikld, Ilu 

 1924 



12324—800 



