Ill 



The Geological Conditions of JMunicipal AVater Supply in the 

 Driftless Area op Southern Indiana. 



By E. R. Cumings. 



I. Introduction. 



Description of the driftless area. 



Character of the rocks and topography. 

 II. The Knobstone area. 



Peculiarities of the rock formations. 



Topography and soil. 



Water-bearing qualities. 



Water-producing qualities of the alluvial valleys of the region. 



Climatological data of the driftless area. 



Relation of rainfall to runoff. 



Conditions affecting the impounding of water in the Knobstone 

 region. 



Proper construction of dams. 



Indiana University dam. 

 III. The limestone area. 



Peculiarities of the rock formations. 



Topography and soil. 



Cavernous character of the rocks and development of underground 

 drainage. 



Difficulties of impounding water. 



Character of the springs of the region. 



General inadequacy of springs without impounding the water. 



Deep and shallow wells. 



Valley alluvium. 

 IV. The Chester- ^Mansfield area. 



Peculiarities of the rock formations. 



Topography and soil. 



Intermediate character of the region. 



Conditions affecting the impounding of water. 



Wells. 



