ETUDES SUE 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, 



