THE ARAPAHOE GLACIER 



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measured at twenty-four degrees, which is greater than the slope 

 at any other place excluding the neve and the immediate margin 

 of the glacier. Many of the crevasses in this zone are forty rods 

 long, and some stand open as much as ten feet. They are spaced 

 at intervals of a few yards. The blocks thus formed appear to 

 have been tilted forward. This is inferred from the fact that the 



FlG. 5. — General view looking south over crevasses to the neve. 



brink on the lee side of each crevasse is higher than that on the 

 opposite or stoss side, and the surface of each block has a steeper 

 slope than that of the ice as a whole in this vicinity. Lines 

 dropped into these crevasses did not reach depths greater than 

 fifty feet, but apparently water is running at much greater depths. 

 The appearance of the ice in these crevasses is clear and bluish, 

 with occasional bands which are stained as if with dust. In the 

 same zone are some small cracks, limited in length to seven or 

 eight feet, which stand open about two inches at the center. 



Near the margin of the ice a system of longitudinal crevasses 

 is made quite prominent by the control which these exercise over 



