416 LOUIS AGASSIZ. 



rey, at Princeton, a small town half a day's 

 journey from New York, and the seat of a 

 considerable university, one of the oldest in 

 the United States. The physical department, 

 under the direction of Professor Henry, is re- 

 markably rich in models of machinery and in 

 electrical apparatus, to which the professor 

 especially devotes himself. The museum con- 

 tains a collection of animals and fossil re- 

 mains. In the environs of the town, in the 

 ditches, is found a rare kind of turtle, re- 

 markable for the form of the jaws and the 

 length of the tail. I wish very much to pro- 

 cure one, were it only to oblige Professor 

 Johannes Miiller, of Berlin, who especially 

 desires one for investigation. But I have 

 failed thus far ; the turtles are already with- 

 drawn into their winter quarters. Mr. Tor- 

 rey promises me some, however, in the spring. 

 It is not easy to get them because their bite 

 is dreaded. 



After this I passed four days in Philadel- 

 phia. Here, notwithstanding my great desire 

 to see the beautiful country along the shores 

 of the rich bay of Delaware and the banks 

 of the Schuylkill, between which the city lies, 

 I was entirely occupied with the magnificent 

 collections of the Academy of Science and 



