CHOROCUA BAY. 733 



terest for Agassiz, because the vessel kept 

 along the northern side of the Strait, while 

 the course hitherto had been nearer the south- 

 ern shore. He could thus better compare the 

 differences between the two walls of the Strait. 

 The fact that the northern wall is more evenly 

 worn, more rounded than the southern, had a 

 special significance for him, as corresponding 

 with like facts in Switzerland, and showing 

 that the ice-sheet had advanced across the 

 Strait with greater force in its ascending than 

 in its descending path. The north side being 

 the strike side, the ice would have pushed 

 against it with greater force. Such a differ- 

 ence between the two sides of any hollow or 

 depression in the direct path of the ice is well 

 known in Switzerland. 



Later in the day, a pause was made in 

 Chorocua Bay, where Captain Mayne's chart 

 makes mention of a glacier descending into 

 the water. There is, indeed, a large glacier 

 on its western side, but so inaccessible, that 

 any examination of it would have required 

 days rather than hours. No one, however, re- 

 gretted the afternoon spent here, for the bay 

 was singularly beautiful. On either side, deep 

 gorges, bordered by richly-wooded cliffs and 

 overhung by ice and snow-fields, were cut into 



