ALPINK RCtTLPTURfl. 1 89 



As in all other measurements of this kind, the retarding 

 influence of the sides of the glacier is manifest: the center 

 moves with the greatest velocity. 



Morteratsch Glacier, Line B. 



No. of Stake. Hourly Motion. 



1 0.05 inch 



2 0.14 " 



3 0.24 " 



4 0.32 " 



5 0.41 " 



6 0.44 " 



7 0.44 " 



8 0.45 " 



9.... 0.43 " 



10 0.44 " 



11 0.44 " 



The first stake of this line was quite close to the edge of 

 the glacier, and the ice was thin at the place, hence its slow 

 motion. Crevasses prevented us from carrying the line 

 sufficiently far across to render the retardation of the fur- 

 ther side of the glacier fully evident. 



Morteratsch Glacier, Line C. 



No. of Stake. Hourly Motion. 



1 0.05 inch. 



2. . . 0.09 " 



3 0.18 " 



4 0.20 " 



5 0.25 



6 0.27 



7.. 0.27 



8 0.30 



9 0.21 



10 0.20 



11 0.16 



Comparing the three lines together, it will be observed 

 that the velocity diminishes as we descend the glacier. In 



