160 LOUIS AGASSIZ. [CHAI-. xx. 



Emperor Dom Pedro; and in 1877, in Paris, the Em- 

 peror thanked me, saying how highly he appreciated 

 Hartt and his assistants, Orville A. Derby, R. Rathbun, 

 and J. Branner, " all very able and conscientious young 

 savants," as he expressed it. Unhappily yellow fever 

 killed Hartt in March, 1878, after only two years of 

 work on the geological survey of Brazil, which was 

 discontinued. 



Orestes H. Saint John, another of Agassiz's assistants 

 on the Brazilian journey, is the only student of fossil 

 fishes that Agassiz had in America. An extremely 

 modest man, Saint John has since distinguished him- 

 self by the publication of memoirs of great value on 

 the fossil fishes of Illinois and other Western states, 

 and stratigraphical researches on the state of Kansas. 



As to William James, a gifted member of a gifted 

 family, his journey to Brazil and up the Amazons 

 developed his keen power of observation, in a psycho- 

 logical direction and in the philosophical realm, and he 

 has since been made one of the professors of philos- 

 ophy at Harvard University, and become one of the 

 most enlightened disciples of the Charcot school of 

 psychology. 



Samuel H. Scudder, the author of the charming 

 sketch, " In the Laboratory with Agassiz," is one of 

 the best pupils, and perhaps the most devoted natu- 

 ralist, who studied under Agassiz. He has devoted 

 his life to American entomology, living and fossil, and 

 has published standard and most beautiful works on 

 these subjects. Fossil insects, more especially, have 

 been his favourite study for many years, and we may 



