218 LE SOU RIN ALE NOLIN GT OL O|Ge 
the common habit of this region. The familiar central tunnel, 
or main drainage line near the middle of the valley was absent, 
and only little streamlets flowed away from this portion of the 
glacier. These were very largely formed from the streamlets of 
the surface which came cascading down the terminal face. No 
large amount of water appeared to be coming from beneath the 
base, and this was not murky from glacial silt, as is the manner 
of streams issuing from beneath active glaciers. The main 
drainage from the glacier flowed along its two sides. At its 
extremity these lateral streams followed down the borders of the 
frontal plain, or turned obliquely out toward the center, branch- 
ing meanwhile freely, and at length usually came together some 
distance below the end of the glacier. These lateral streams 
were murky with silt, but whether it was chiefly due to their 
tumultuous descent over the lateral débris, or to subglacial 
grindings, it was not easy to determine. There was doubtless 
something of both. 
The valley occupied in part by the Igloodahomyne glacier 
afforded an interesting opportunity for comparing the relative 
rates of meteoric degradation and glacial erosion, though beyond 
a doubt the comparison is very unfair to the glacier, for here its 
power was at an extreme minimum, while the steep faces of the 
adjacent bluffs and the very effective frost action intensified the 
meteoric agencies of degradation to nearly their maximum effi- 
ciency. It was none the less interesting to observe that on the 
sides of the valley very large and symmetrical alluvial cones 
were formed at the foot of ravines leading up to the summit 
plateau. The valley below the glacier retained very little sign 
of previous glacial occupancy. (See background of Fig. 21) 
Attention has already been called to the spreading of one of 
these alluvial cones out upon the edge of the glacier. A com- 
parison between the facility with which these alluvial cones were 
formed, and the rate of glacial corrasion, was here at least 
altogether unfavorable to the latter. But, as remarked before, 
this is taking the glacier at the greatest disadvantage. 
T. C. CHAMBERLIN. 
