1843-44-] COLLABORATORS. 219 



the number of species without proper restriction. But 

 this is only a detail, which does not affect the final 

 result and conclusions, nor the prodigious capacity of 

 his memory, in which lay the true secret of his classifica- 

 tion of fossil fishes. 



In regard to the help that Agassiz received in his 

 " Poissons fossiles " : in the first place, the excellent 

 drawings were made by Dinkel and Mrs. Agassiz, those 

 of the latter being fully as good as and rivaling in 

 execution the best of the artist Dinkel. Secondly, after 

 the issue of the first twelve parts or " livraisons," Agas- 

 siz made a great deal of use of his assistant Karl Vogt 

 and his secretary Desor, in preparing the bones and the 

 scales, and in writing the descriptions of species and 

 even of genera. But as Vogt wrote me : " Agassiz 

 avait parfaitement le droit de s'attribuer ces travaux, car 

 il me payait pour cela, j'etais son preparateur a gages 

 sous ce rapport." Only one-third of the work was thus 

 prepared with his two collaborators, under Agassiz's 

 direction ; but this may be said, that it would have been 

 much better if he himself had finished what he had so 

 well begun and continued until 1838. 



At the end of July, 1843, Agassiz returned to his 

 work on the glacier of the Aar. A new cabin had been 

 erected, which was called the " Pavilion " ; and Daniel 

 Dollfus-Ausset, with his son, established himself close 

 by, in another cabin. The time was passed in measuring 

 the motion of the glacier, its temperature, etc., and in 

 Alpine climbing. On the whole, it was a rather ex- 

 pensive campaign, and the results were inadequate 

 compared with the money expended. 



