88 
ALASKA GLACIERS 
pinnacles, two lines of medial moraines are distinctly 
traceable, each partitioning off a fourth part of the ice 
stream at the side. 
The Bryn Mawr, next south of the Smith, is somewhat 
larger. Its two main branches, gathering in mountain val¬ 
leys not well seen from the sea, become visible in twin 
cascades, and then, uniting their streams, make a second 
leap to the sea. As tide is reached, there is a tendency to 
flatten the profile, and the central portion of the stream 
becomes nearly or quite horizontal for a few hundred feet 
before breaking off in the terminal cliff. 
Next in the series comes the Vassar, parallel to the 
Smith and Bryn Mawr and exhibiting a similar series of 
cascades, but of smaller size and less direct in its course. 
It is cumbered, especially in its lower part, by rock debris, 
and close inspection was necessary to determine the fact 
that it was actually tidal. 
The Wellesley, last of the tidal series, flows with gentle 
grade through a mountain trough joining the fiord at right 
angles, and then cascades to the sea, into which it plunges 
without notable modification of profile. Beyond it are 
small glaciers occupying alcoves on the mountain front 
but ending far above the water. 
The Bryn Mawr, Smith and Radcliffe are represented 
in fig. 45, the Bryn Mawr alone in the frontispiece, and the 
Wellesley in a plate at page 122 of volume 1, from a pho¬ 
tograph by Merriam (No. 121, U. S. Biological Survey 
series). The Bryn Mawr was photographed at shorter 
range by Curtis (No. 276 a), but the view has not been 
reproduced. 
In the intervals between the tidal glaciers just described 
there is no forest at the water’s edge, and the photographs 
reveal none at higher altitudes; but a little farther south 
the coast is forested, and the trees climb up a few hundred 
feet on the moraine heaps under the hanging glaciers. 
