TO HIS EXCELLENCY 

 THE HO^. JOHtf L. BEVEKIDGE, 



GOVERXOR OF THE STA.TE OF ILLIXOIS. 

 SIR: 



I have the honor of submitting herewith, for publication, the fifth 

 volume of my. report on the Geological Survey of Illinois, in ac- 

 cordance with the provisions of an act of the Twenty-seventh 

 General Assembly, approved April 3d, 1872. 



As soon as practicable after the passage of the act above named, 

 contracts were made for engraving the plates for this volume, and 

 this part of the work is now so nearly completed that the print- 

 ing need not be longer delayed. 

 I have the honor to be 



Your obedient servant, 



A. H. WORTHEN. 



GEOLOGICAL ROOMS, ) 

 Springfield, Illinois, June, 1873. ) 



