Tlie Mnvciin of the CornelJ Glacier. 143 
into tloines, on the sites of buried hills — unborn nuiiataks — 
and those where the motion was rapid. The crevassed domes 
varied in diameter but were surrounded by smooth areas so 
tliat the crevassing was apparently due to the cause which 
produced the local upswelling. 
The more general crevassing, included under the second di- 
vision, was confined to the distinct valley portions of the gla- 
ciei', where the movement was more rapid. Practically the 
entire area of each glacier tongue, from the land l)oundar3'- on 
either side, was thus crevassed ; and the irregularity increased 
perceptibly toward the central and lower portions. In reality, 
along this part of the ice the smooth traversible areas were 
the exception; and in our journey to mount Schurman we 
were obliged to look carefully to see whether we could pass 
out to the nunatak over the ice. There was but one feasible 
route, unless we should make a detour from a distant point 
and approach the nunatak from the rear by a journey of 25 or 
30 miles. This smooth area lay between the two nunataks, 
and hence in the line of slight motion. From the fact that in 
this place the ice surface was distinctly higher than on either 
side in the two arms of the Cornell glacier, we also concluded 
that this was a ridge over the buried highland in the under- 
lying land. In other places it was also found that the ice cap 
could be reached most easily from the divide areas between 
two valley tongues. This was notably the case between the 
Cornell glacier and the Wyckotf glacier, which is the next 
valley tongue on the northern side of the one which we chiefly 
studied. 
Ice Motion. So marked was the irregularity of the ice 
surface that it became evident upon first inspection, and cer- 
tain after some attempts had been made, that it would be im- 
possible to go out upon either the north or the south arm of 
the Cornell glacier to a sufficient distance to obtain the real 
average rate of motion. With little time at our command, 
and manj^ new features to study, we decided that the attempt 
to measure the rate of movement of the glacier promised less 
results than a study of other features. Hence no actual meas- 
urements were made; but from the amount of ice coming from 
the front of the glacier it was evident that the rate was con- 
siderabl3'^ less than in some glaciers hitherto measured on this 
