of 



ilar experience. These rivers appear to mark 

 the "Farthest South" of the ice; their position 

 probably was determined by the ice. Had a line 

 been traced on the map along the ragged edge 

 and front of the glacier at its maximum exten- 

 sion, this line would almost answer for the pre- 

 sent position of the Missouri and Ohio Rivers. 



The most suggestive and revealing words con- 

 cerning glaciers that I have ever read are these 

 of John Muir in "The Mountains of California": 

 "When we bear in mind that all the Sierra for- 

 ests are young, growing upon moraine soil re- 

 cently deposited, and that the flank of the range 

 itself, with all its landscapes, is new-born, re- 

 cently sculptured, and brought to light of day 

 from beneath the ice mantle of the glacial win- 

 ter, then a thousand lawless mysteries disappear 

 and broad harmonies take their places." 



"A glacier," says Judge Junius Henderson, 

 in the best definition that I have heard, "is a 

 body of ice originating in an area where the 

 annual accumulation of snow exceeds the dissi- 

 pation, and moving downward and outward to 

 an area where dissipation exceeds accumulation." 



250 



