604 THE ILLINOIS GLACIAL LOBE. 



than 200 feet, but one well reached a depth of 212 feet without encoun- 

 tering rock. Two wells in the west part of the township, on the farms of 

 Taylor Thompson and William Storey, at altitudes about 950 feet, struck 

 an inflammable gas in gravel at depths of 125 to 150 feet. The drift is 

 mainly till above this gravel. Strong wells are obtained from gravel in 

 that vicinity at 100 to 150 feet. 



On the plain in the southeast part of the county wells are usually 

 obtained at depths of 30 or 40 feet. The railroad well at Hinckley, how- 

 ever, was sunk to a depth of 190 feet and entered rock at about 100 feet. 

 The altitude is 750 feet at this well. At Sandwich, where the altitude 

 is only 655 feet, the wells for the public water supply are sunk to a depth 

 of 113 feet without entering rock. Several tubular wells are driven in the 

 bottom of a large well. Private wells in Sandwich and vicinity usually 

 obtain an abundant supply at about 30 feet. 



In the southwest part of the county several flowing wells have been 

 obtained from the drift at depths of less than 30 feet. Ten such wells have 

 been made on sec. 32, T. 37, R. 3 E., whose depths are but 22 to 27 feet. 

 A well in sec. 31 is 24 feet. The altitude at these wells is about 725 feet 

 above tide. This flowing well district extends southward to Earlville in 

 Lasalle County. The absorption area is probably from the moraine on 

 the northwest. A well in sec. 2, T. 37, R. 3 E., 67 feet in depth, passed 

 through an old soil at 55 to 60 feet. The altitude at the well is about 

 800 feet. 



OGLE COUNTY. 

 GENERAL STATEMENT. 



Ogle County is situated west of the northern part of Dekalb County, 

 and south of Winnebago and Stephenson counties. It has an area of 780 

 square miles, and Oregon is the county seat. Rock River traverses the 

 county nearly centrally in a course west of south, and the count}' is drained 

 by small tributaries of that stream. The greater part of the county is 

 covered but thinly with drift, and preglacial ridges and valleys are in many 

 cases readily traced. The outer moraine of the Wisconsin drift touches the 

 southeast corner of the county, and the drift there is 250 feet or more in 

 thickness. The large preglacial valley, thought to be the old course of 

 Rock River, traverses the eastern part of the county in a north to south 



