WATER AS A MECHANICAL AGENT. 



237 



the Lechaud Glacier (l), and then becomes the trunk glacier, called the 

 Glacier des Bois (6s) . The Lechaud Glacier has its tributaries, one of which 

 is the Glacier du Talefre {ta), on the border of which is the Jardin (J). 

 This union of tributaries is well shown in Fig. 209 (Tyndall), which is so 

 labeled as not to require special explanation. The glaciers of the steeper 

 and warmer Italian slopes, as the map shows, are relatively short. 



The Monte Eosa ice-region has still grander glaciers. It is reached by 

 a road from Visp, on the Ehone, 30 miles long, to Zermatt. Within it stand 

 the Matterhorn or Mont Cervin, 14,780 feet high, the Breithorh, and other 

 peaks, overlooking the Gorner Glacier. Fig. 210 is reduced from a plate in 

 Agassiz's great work on glaciers. The Gorner Glacier comes in from the left 

 around the Eiffelhorn, while on the right a tributary glacier is received from 

 the Matterhorn region. 



210. 



The Gorner Glacier, with the Breithorn in the distance. Agassiz. 



The glaciers of the Bernese Alps, like those of the Mont Blanc and 

 Monte Eosa regions, are largest over the Ehone valley slopes. The long 

 river-like Aletsch and Viesch glaciers have their snow-field sources against 

 the Jungfrau and other north-side peaks, and the former descends to 

 within 4440 feet of the sea level. More to the eastward flow the two crreat 

 Finsteraar and Lauteraar ice-streams, which unite a few miles from the 

 Grimsel Hospice, to form the Aar Glacier, on which Agassiz made his obser- 

 vations. Sloping northward away from the Ehone valley, there are only 



