8 



THE GEOLOGIST, 



" Moraines increase in thickness at their extremities." Ayassiz. 

 " Lateral and medial moraines decrease gradually with increase of alti- 

 tude/' Agassiz. 



*' The moraines occurring in one and the same glacier vary much in 

 size." Agassiz. 



** Medial moraines are frequently wMmerows in one and the same glacier; 

 the glacier of Zermatt contains four." Agassiz. 



" At the point of junction of any two lateral moraines, the medial mo- 

 raine formed by them is always depressed, as in the glaciers of the Aar, 

 Breithorn, Zermatt, and Lyskamm." Agassiz. 



" Beds of fragments of rocks occur near the termination of the glacier 

 of Zmutt, in the valley of St. Nicholas." Agassiz. 



"The terminal moraines never rest upon the surface of the glacier, but 

 commence from beneath the glacial mass, forming ramparts at the ex- 

 tremity." Agassiz. 



" Numbers of * ice tables' occur on the glaciers of Lauteraar." 

 Agassiz. 



"A table of ice on the lower glacier of the Aar, 15 feet long by 12 

 wide, and 6 high, slipped from its position in 1840." Agassiz. 



Tables of ice rarely occur near the termination of a glacier; they 

 generally occur where the inclination is trifling, and in the neighbourhood 

 of medial moraines." Agassiz. 



" The greatest number of ice tables that I have seen, are on the lower 

 glacier of the Aar, where the large medial moraine approaches the right 

 lateral moraine, at an elevation of 6,500." Agassiz. 



" On the glacier of Zermatt a great number of ice tables occur at an 

 elevation of 7^000 feet." Agassiz. 



" The occurrence of needle glaciers is always a proof of inequalities in 

 the subformations," Agassiz. 



" Gravelly cones are most numerous in the lower glacier of the Aar, 

 and that of Zermatt." Agassiz. 



" Gravel cones always occur near the middle, or in the upper portions 

 of glaciers." Agassiz. 



" Large lakes of water are often collected in ice dikes, as at Pussay at 

 the side of the Adie." Agassiz. 



" During the warm days of summer, you may observe on the glacier 

 of Zermatt, immense torrents of water disappear beneath the glacier, at 

 an elevation of 8,000 feet." Agassiz. 



" Caverns are largest and most frequent in glaciers only slightly in- 

 clined, as at Zermatt, Zmutt, and Bois." Agassiz. 



