THE MASSIF OF MONT PLANC. 
13 
the glacier. It has a height of from 30 to 50 metres, 
and bears many immense blocks of Protogine. 
The polished surfaces of rock near the Glacier 
de Triolet, and of Mont Dolent reach a height of 
2500 metres, that is to say, nearly to the Col du 
Petit Ferret. 
The moraine of Ivrea at the mouth of the Val 
d’Aosta (see vol. i. p. 139) is the greatest in the 
Alps, or indeed in Europe. 
Scenery of Switzerland. //. 
8 
