268 Prof. Tyndall on the Conformation of the Alps. 



Morteratsch Glacier, Line A. 



No. of stake. Hourly motion. 



1 0-35 inch. 



2 0-49 



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3 0-53 



4 0-54 



5 0-56 



6 0-54 



7. . 0-52 



8 0-49 



9 0-40 „ 



10 0-29 „ 



11. . 0-20 „ 



As in allother measurements of this kind, the retarding influence 

 of the sides of the glacier is manifest : the centre moves with the 

 greatest velocity. 



Morteratsch Glacier, Line B. 



No. of stake. Hourly motion. 



1 0-05 inch. 



2 014 „ 



3 0-24 „ 



4 . 0-32 „ 



5 0-41 „ 



6 0-44 „ 



7 0-44 „ 



8 0-45 „ 



9 0-43 „ 



10 044 „ 



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 further 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 



9 021 



10 0-20 



11 0-16 „ 



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