Farthest South. 281 
through the great but steady pressure of the ice sheet, 
and the iceberg will, even after the “calving”. has 
taken place, maintain the character of the barrier or 
ice sheet from which it sprang. The uppermost parts 
of the bergs broken from the barrier will generally 
carry a from 30 to 4o ft. thick horizontal layer of ice 
formed by snow-fall, which, through pressure of the 
wind, has quickly taken the nature of ice, but remains 
easily distinguishable, because of its whiteness of colour 
and soft structure, from that of the underpart, the crystal, 
clear green and blue, stratified, broken glacier ice. 
Ruled by the prevail- 
ing under-current, these 
monarchs moved north-east- 
q oe 2: 
P 
AT THE FOOT OF MOUNT TERROR, WHERE BORCHGREVINK AND 
JENSEN NEARLY LOST THEIR LIVES. 
wards, but although only, in my opinion, one in their 
origin, these bergs with their different appearances 
are really brethren. The pack, however, showed 
