ETUDES SUR LES GLACIERS. 295 



cabin has been carried on by the ice with as- 

 tonishing rapidity, and still more important is 

 it that this rapidity has been on the increase; 

 for in 1830 the cabin was only some hundred 

 feet from the rock, in 1836 it had already 

 passed over a distance from [word torn away] 

 of two thousand feet, and in the last three 

 years it has again doubled that distance. Not 

 only have I confirmed my views upon glaciers 

 and their attendant phenomena, on this new 

 ground, but I have completed my examina- 

 tion of a number of details, and have had be- 

 sides the satisfaction of convincing one of my 

 most severe opponents of the exactness of my 

 observations, namely, M. Studer, who accom- 

 panied me on a part of these excursions. . . . 



The winter of 1840 was fully occupied by 

 the preparation for the publication of the 

 " Etudes sur les Glaciers," which appeared 

 before the year was out, accompanied by an 

 atlas of thirty-two plates. The volume of 

 text consisted of an historical resume of all 

 that had previously been done in the study of 

 glaciers, followed by an account of the obser- 

 vations of Agassiz and his companions during 

 the last three or four years upon the glaciers 

 of the Alps. Their structure, external aspect, 



