618 LOUIS AGASSIZ, 



whole suites that I may revise my former iden- 

 tifications in the light of a larger insight. 



Remember me kindly to all my Zurich 

 friends, and especially to C. Escher. . . . 



His ever - increasing and at last wholly un- 

 manageable correspondence attests the general 

 sympathy for and cooperation with his scien- 

 tific aims in the United States. In 1853, for 

 instance, he had issued a circular, asking for 

 collections of fishes from various fresh-water 

 systems of the United States, in order that he 

 might obtain certain data respecting the laws 

 of their distribution and localization. To this 

 he had hundreds of answers coming from all 

 parts of the country, many of them very 

 shrewd and observing, giving facts respecting 

 the habits of fishes, as well as concerning their 

 habitat, and offering aid in the general object. 

 Nor were these empty promises. A great 

 number and variety of collections, now mak- 

 ing part of the ichthyological treasures of the 

 Museum at Cambridge, were forwarded to him 

 in answer to this appeal. Indeed, he now be- 

 gan to reap, in a new form, the harvest of his 

 Avandering lecture tours. In this part of his 

 American experience he had come into con- 

 tact with all classes of people, and had found 



