CHAPTER II 
PLEISTOCENE GLACIATION 
All geologists who have studied the region we tra¬ 
versed are agreed that the glaciers were much more ex¬ 
tensive in Pleistocene time than now; but opinions dif¬ 
fer widely as to the actual magnitude of the ancient ice 
fields, and also as to the extent to which they modified the 
topography of the country. As the nature of my journey 
rendered my view somewhat cursory and superficial, and 
as nearly all parts of my route had been covered, with 
better opportunity, by one or more of my predecessors, 
I can not expect to settle any of the vexed questions, but 
it still seems best to make rather full record of my obser¬ 
vations and impressions. When an observer views a 
complex phenomenon his attention is naturally directed 
to the particular features which his previous training en¬ 
ables him to appreciate — he “ sees what he has eyes to 
see and the difference of eyes makes the work of 
independently trained observers more or less comple¬ 
mentary. 
( 113 ) 
