RELATIONS WITH ARNOLD GUYOT. 291 



the same time, and finally settled as profes- 

 sors, the one at Harvard College, in Cam- 

 bridge, Massachusetts, and the other at the 

 College of New Jersey, in Princeton. They 

 shared all their scientific interests ; and when 

 they were both old men, Guyot brought to 

 Agassiz' s final undertaking, the establishment 

 of a summer school at Penikese, a coopera- 

 tion as active and affectionate as that he had 

 given in his youth to his friend's scheme for 

 establishing a permanent scientific summer 

 station in the high Alps. 



In a short visit made by Agassiz to Paris in 

 the spring of 1838 he unfolded his whole 

 plan to Guyot, then residing there, and per- 

 suaded him to undertake a certain part of the 

 investigation. During this very summer of 

 1838, therefore, while Agassiz was tracing the 

 ancient limits of the ice in the Bernese Ober- 

 land and the Haut Valais, and later, in the 

 valley of Chamounix, Guyot was studying the 

 structure and movement of the ice during a 

 six weeks' tour in the central Alps. At the 

 conclusion of their respective journeys they 

 met to compare notes, at the session of the 

 Geological Society of France, at Porrentruy, 

 where Agassiz made a report upon the gen- 

 eral results of his summer's work; while Guyot 



