ORDER OF EVENTS. 121 



extinct and a few remain only in those 

 regions which are still Arctic. This is the 

 order of events as we can read it with 

 tolerable certainty in the language of Time- 

 relative. But we have little means of 

 knowing what relation this order of events 

 bears to Time-absolute. It is still disputed 

 among Geologists how far the causes of geo- 

 logical change were once more intense in 

 their action than they are now. It is quite 

 certain that during the passing away of a 

 glacial climate, the cutting power of rivers 

 must have been intensified by the increasing 

 rapidity with which ice and snows were 

 melted. There are also facts connected with 

 the position in which remains of the extinct 

 animals are often found, which cannot, in my 



