STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
W. H. H. Mivter, Director 
pee BOARD OF 
NATURAL RESOURCES AND CONSERVATION 
W. H. H. Mitirr, Chairman 
; WILLIAM TRELEASE, Biology JoHN W. Atyorp, Engineering 
JouHn M. Courter, Forestry Kewnpric C. BABcock, Representing the 
Roxirin D. Sarispury, Geology ‘ President of the University of Illi- 
- Wittram A. Noyes, Chemistry nois ; 
THE NATURAL HISTORY SURVEY DIVISION 
SrerpHen A. Forses, Chief 
(64922—1200—6-22) 
PHILLIPS BROS.* PRINT. ey 
SPRINGFIELD, LLINOIS. Cie 
