YALE GLACIER 
83 
amount, although greater than in the case of La Perouse 
and Columbia glaciers. The Crescent is comparatively 
narrow, and approaches the sea with a higher grade. A 
curve in its trough conceals its upper course. 
The Yale drains a larger area and receives a number of 
tributaries. The front of the cliff is wide, but of moderate 
height, and a blackening, west of the middle, by englacial 
drift suggests that a rock knob may lie near the surface, 
ready to develop into a nunatak or island if the glacier 
shall diminish. The trough in which it lies is forested 
along the water edge on both sides for the greater part of 
the distance 
from the main 
fiord to the 
glacier, but 
barren in the 
immediate 
vicinity of 
the glacier. 
There are 
straggling 
trees high on 
the valley 
wall at the 
end of the 
glacier, but 
they do not come down close to the ice. An excellent 
photograph of the glacier is reproduced at page 128 in 
volume 1. It is enlarged from negative 113, U. S. Biolog¬ 
ical Survey. A nearer view of the eastern part of the 
front (fig. 43), although lacking detail at the critical 
point, may serve a purpose for comparison when the gla¬ 
cier shall be revisited. It shows a small tributary, cas¬ 
cading from a hanging valley near the end of the main 
glacier. 
FIG. 43. EAST PART OF FRONT OF YALE GLACIER. 
Shows position of front in 1899 in relation to a tributary from the east. 
