ix.] ALPINE TRAVELS, 1842. 277 



called unexpected, it filled me with the most lively 

 pleasure. The diurnal motion of a glacier was deter- 

 mined, as I believe, for the first time from observation, 

 and the method employed left no doubt of its being 

 urately determined. . . .' 



It is not necessary to describe at length the observa- 

 tions by means of which during the next few da} T s he 

 arrived at the following conclusions, which are found in 

 his notes of June 30th : 



1. That glacier motion is approximately regular. 



2. That it is nearly as great during the night as 

 daring the day. 



:}. That an increase of motion observed on the 28th, 

 ., and :30th, was due to the heat of the weather. 



And to these, next day, July 1st, having examined his 

 ons arranged for the purpose, he adds 



4. That the centre of the glacier moves quicker than 

 the sides. These conclusions he communicated to Pro- 

 fessor Jameson in his ' First letter on glaciers,' dated 

 July 4th. 



To E. C. BATTEN, ESQ. 



' MOXTAXVEKT, CHAMOUNIX, June SOtk. 



' When I tell you that I have been out thirteen 

 hours on the glacier to-day, and that I have done not 

 much less for >'-\eral days, you will understand that, 

 what with active exercise and observations and taking 

 s of what concerns my present inquiry, it is with 

 the utinoM (liiliculty I can do anything else except eat 

 and sleep ! I rejoice to tell you that everything relative 

 to my glacier o! on in the most delightful 



and favourable manner. I may literally say, 



lM].pilv tin- da\s of Tl.alaba went by !" 



Hit! i movements of glaciers have been reckoned 



by years. Some thought they stalled on, moving at 



te seasons or houn, and stopping al others; but bl 



SIX I hard work have enabled mo to rMablisll, 



