Xii CONTENTS. 



Chapter XIV. — Wells of Illinois — Continued. Page. 



Detailed discussion — Continued. 



Effingham County - - «°3 



.Jasper County ; '°* 



Crawford County 755 



Lawrence County 756 



Richland County 756 



Clay County - 757 



Marion County ' ;lS 



Clinton County - 760 



St. Clair County - 761 



Monroe County '° D 



Randolph County 767 



"Washington County 770 



Perry County - 771 



Jefferson County 773 



Wayne County 774 



Edwards and Wabash counties 775 



White County - 776 



Hamilton County '•' 



Franklin County - 77s 



Jackson County -- 778 



Williamson County 780 



Saline County 781 



Gallatin County - 783 



Unglaciated counties of southern Illinois 784 



Chapter XV. — Soils - 788 



Sources of soil material 788 



Classes of soil 788 



Residuary soils 791 



Bowlder-clay soils 792 



Gravelly soils - 792 



Sandy soils -- 793 



Bluff-loess soils - 793 



Silts slowly pervious to water - 794 



Fine silts, nearly impervious - 795 



Peaty and organic soils -- 796 



Index - 799 



