i STATE OF ILLINOIS 
DEPARTMENT OF REGISTRATION AND EDUCATION 
W. H. H. Miter, Director 
> BOARD OF 
NATURAL RESOURCES AND CONSERVATION 
W. H. H. Mutter, Chairman 
WiLL1AM TRELEASE, Biology JoHn W. Atvorp, Engineering ; 
JoHN M. Covutter, Forestry Kernpric C. Bascock, Representing the 
Rottin D. Saispury, Geology President of the University of Ili- 
Wi11am A. Noyes, Chemistry _nois 
THE NATURAL HISTORY SURVEY DIVISION 
STEPHEN A. Forbes, Chief 
ScHNEPP & BARNES, PRINTERS *, 
SPRINGFIELD, ILL. 
1922 
a 62354—1200 
