STATE OF ILLINOIS 



DEPARTMENT OF REGISTRATION AND EDUCATION 

 W. H. H. MILLER, Director 



BOARD OF 



NATURAL RESOURCES AND CONSERVATION 

 W. H. H. MILLER, Chairman 



WILLIAM TRELEASE, Biology 

 JOHN M. COULTER, Forestry 

 ROLLIN D. SALISBURY, Geology 

 WILLIAM A. NOYES, Chemistry 



JOHN W. ALVORD, Engineering 



KENDRIC C. BABCOCK, Representing the 

 President of the University of Illi- 

 nois 



THE NATURAL HISTORY SURVEY DIVISION 

 STEPHEN A. FORBES, Chief 



(52929-1200-7-21) 



