WELLS OF CUMBERLAND COUNTY, ILLINOIS. 737 



*s 



a black soil formed at the surface of the till. The body of the drift appear 

 to be generally a hard till oxidized to a yellowish color for a depth of about 

 12 to 15 feet, beneath which it has a blue-gray color. 



The wells in this county, like those in Clark County, on the east, are 

 usually of sufficient capacity to supply the needs of the residents, though 

 they seldom yield more than 10 barrels a day. The till apparently has 

 only local inclusions of sand and gravel, seldom of sufficient amount to 

 furnish strong wells. The depth of wells rarely exceeds 40 feet, and the 

 majority are only 10 or 15 feet. It is probable that they are largely filled 

 from the well mouth by water running into them from the surface of the 

 ground during rainy seasons. 



INDIVIDUAL WELLS. 



At Toledo the strongest wells are obtained at about 60 feet from gravel 

 below till. At the bend of the Embarras River, about 5 miles northeast of 

 this village, two wells situated on the terrace about 20 feet above the river 

 are 67 and 71 feet in depth. They each penetrate about 20 feet of gravel, 

 beneath which they are entirely in sand and do not strike rock. At the 

 bluff of the river, east of these wells, the following section is exposed, 

 which, it will be observed, is entirely different from the sections of the wells: 



Section of bluffs of Embarras Elver, near Toledo, Illinois. 



Feet. 



White clay 4 



Soil and pale clayey snbsoil '. 5 



Brown till 20 



Gray till 30 



At Greenup the wells are usually obtained near the base of the drift, 

 at a depth of about 30 feet. The rock in the vicinity of Greenup stands at 

 an elevation nearly 50 feet above the Embarras River. 



At Neoga, on the west border of the county, wells are usuallv obtained 

 at about 15 feet. A boring for coal is reported to have entered rock at less 

 than 40 feet, there being a bed of coal at that depth. 



SHELBY COUNTY. 

 GENERAL STATEMENT. 



Shelby County is situated southeast of the center of the State, imme- 

 diately west of Cumberland and Coles counties. It has an area of 776 

 mon xxxviu 47 



