State of Illinois 



NATURAL HISTORY SURVEY DIVISION 



Stephen A. Forbes, Chief 



BOARD OF NATURAL RESOURCES AND CONSERVATION 



WlLLIAN TRELEASE . 



John M. Coulter 

 Rollin D. Salisbury . 

 William A. Noyes 

 John W. Alvord 

 Kendric C. Babcock . 

 Francis W. Shepardson 



. Biology 



Forestry 



. Geology 



. Chemistry 



. Engineering 



University of Illinois 



. Director 



Frank 0. Lowden, Governor 



i Springfield, III. 



Illinois State Journal Co., State Printers 



19 2 



18048—2000 



