23 



CHAPTER VII. 



On the Origin and Formation of the Prairies, LEO LES- 

 QUEREUX 238-254 



CHAPTER VIII. 



Chemical Report for the Geological Survey of Illinois, DR. 

 J. V. Z. BLANEY 255-277 



CHAPTER IX. 

 Geology of Randolph County, A. H. WORTHEN 278-296 



CHAPTER X. 

 Geology of St. Clair County, A. H. WORTHEN 297-312 



CHAPTER XI. 

 Geology of Madison County, A. H. WORTHEN 313-326 



CHAPTER XII. 

 Geology of Hancock County, A. H. WORTHEN 327-349 



CHAPTER XIII. 



Geology of Hardin County. A. H. WORTHEN and HENRY 

 ENGELMANN 350-375 



CHAPTER XIY. 

 Geology of Johnson County, HENRY ENGELMANN 376-409 



CHAPTER XV. 

 Geology of Pulaski County, HENRY ENGELMANN 410-427 



CHAPTER XVI. 



Geology of Massac County, and that part of Pope County 

 south of Big Bay River. HENRY ENGELMANN 428-455 



CHAPTER XVII. 



Geology of Pope County. North of- Big Bay River. HENRY 



ENGLEMANN 456-495 



Glossary of Scientific Terms 497-504 



