CHAPTER Vm. 
The glaciers which abut upon this sound are prob- 
ably offsets from an interior mer de glace. The val- 
leys or canals which conduct these offsets were de- 
scribed to me as singularly rectilinear and uniform in 
diameter, a fact which derives ready confirmation from 
the known configuration of a dioritic country. Now 
the protrusion of these abutting faces into the waters 
of the sound has been a subject of observation among 
both Danes and Esquimaux. Places about Jacob's 
Harbor, remembered as the former seats of habitation, 
are now overrun by glaciers ; and Mr. Olrik told me of 
a naked escarpment of ice, twelve hundred feet high, 
which he had seen protruding nearly half a mile into 
the sea. 
Crantz and Grraah describe similar protrusions to 
the south. In the conditions which I have just de- 
scribed, of a rectilinear duct of unvarying diameter, 
