10 G. F. Wright—The Muir Glacier. 
probably arose from its being near where the easterly and north- 
easterly currents joined the main movement. 
No. 4 was 5,115 feet N. 42° E. of C, and moved from 
Aug. 20 to Aug. 24, 148 feet in a southeasterly direction. 
No. 5 was 5,580 feet N. 48° H. of C, and moved 289 feet 
from Aug. 20 to 24 in a direction EH. by 39° S. 
No. 6 was 5,473 feet N. 70° E. of C, and moved 232 feet 
from Aug. 11 to Sept. 2 in a direction S. 66° EH. 
No. 7 was 6,903 feet N. 59° E. of CO, and moved 89 feet 
between Aug. 14 and Aug. 24 in a direction S. 3° E., about 
nine feet per day. 
No. 8 was 7,507 feet N. 62° HK. of C, and moved 265 feet 
from Aug. 14 to Aug. 24 in direction 8. 56° EH. These last 
three points lay in one of the moraines on the east side of the 
line of greatest motion and parallel with it. These moraines 
are much interrupted in their course by gaps. 
Not having a logarithmic table with me,in camp these points 
brought under observation proved much nearer the eastern side 
than I supposed at the time. But the distances are so great 
that nothing better could be done from the base-line chosen. 
I should also have established another base-line on the western 
side, but stormy weather, and the difficulty of crossing at the 
times set for doing so, interfered. As the problems are worked 
out it is observable that the points chosen were all east of the 
center of the main line of most rapid motion, and are tending 
with varying velocity toward the northeast corner of the inlet, 
where the powerful subglacial stream emerges from below the 
water level. Doubtless on the other side of the center of mo- 
tion, and at the same relative distance from the front, the ice 
would be found tending toward the southwest corner, where a 
similar subglacial stream emerges. I could but wish that some 
of the points observed had been farther back from the front, 
but must take the facts as they are. I supposed some of them 
were farther away, but as they were projected on the distant 
‘background the true position could not be told until the actual 
working out of, the problems. 
From these observations it would seem to follow that a 
Stream of ice presenting a cross section of about 3,500,000 
square feet (5,000 feet wide by about 700 feet deep) is entering 
the inlet at an average rate of forty feet per day (seventy feet 
in the center and ten feet near the margin of movement), mak- 
ing about 140,000,000 of cubic feet per day during the month 
of August. The preceding remarks upon the many indirect 
evidences of rapid motion render the calculation perfectly 
credible. What the rate may be at other times of the year 
there are at present no means of knowing. 
