124 W. M. DAVIS RELATION OF GEOGRAPHY TO GEOLOGY 



contributing to the wide exploration that in time will cover all the facts 

 and conditions, inorganic and organic, of the earth's present surface, and 

 coming more and more to base its best descriptions on the explanatory 

 speculations regarding structures beneath the earth's surface and regard- 

 ing the processes and conditions of the earth's past history, that have been 

 so ingeniously invented and so wonderfully well established by studies in 

 the field of the older one. 



