16 SUMMEE IN A BOG. 



depth of 300 feet the ground was found to be 

 still frozen. 



During the winter of 1912 it was reported 

 that a road on the line between Champaign 

 and Logan Counties had sunk out of sight, leav- 

 ing a lake behind, 160 feet in length and from 

 four to forty-four feet in depth. A bridge, 

 which disappeared at a previous time, was 

 found at a depth of twenty-four feet. 



Those who bore for wells in this and neigh- 

 boring low lands, say that large bodies of water 

 lie in the ground. It is not impossible that the 

 cavities so existing were at one time occupied 

 by portions of the ancient ice-sheet. 



It is well to remember that North America 



I was not alone in the vast operations of Nature 



which left these indubitable witnesses of her 



power. Over all Northern Asia and Europe 



similar glacial changes were wrought. 



"The Geological Progress of Twenty-five 

 Years," by Lewis G. Westgate, Ph. D., of 

 Delaware, Ohio, has valuable information and 

 suggestions on this branch of investigation: 



"These facts and values are suggestive only, but 

 they are sufficient to show that the ice age was a 

 very long and a very complex period, the successive 

 ice advances being separated by long inter-glacial 

 periods in which the climate may have been as mild 

 or milder than to-day; indeed, it is not certain that 

 we ourselves are not living in an inter-glacial period. 



