280 British Antarctic Expedition. 
The aspects of the Antarctic icebergs are 
distinctly two kinds, although they, in my opinion, 
have their similar origin. They are either discharged 
a MR. COLBECK TAKING SLIP OBSERVATIONS ON FRANKLIN ISLAND. 
from what ordinarily is understood as glacier, or 
broken from the big barrier in the extreme south. 
However, to my mind, the big barrier to the south is 
nothing more than the northern extremity of a great 
ice sheet sloping northwards from land near the South 
| Pole. Although it must needs, on account of its 
| appearance, be recognised as an ice sheet, it is nothing 
more or less than an immense glacier. The bergs 
discharged from. а glacier, will, under = eae 
| elevation and squeezed between immense peaks, 
naturally have a more rugged appearance than the 
bergs discharged from the gentle sloping ice sheet in 
the south. The former are cut through by crevasses, 
rubbed against rocks, and often overturned when 
borne into the sea. The latter gently break oi 
