[hay] the scientific WORK OF PROF. HARTT 16S 



mission. With the assistance of his former colleagues and others, he 

 has published in the Archivos do Museu Nacional do Bio de Janeiro, and 

 in various scientific periodicals in the United States, results that are of 

 great value to science and especially to the country for whose develop- 

 ment Hartt and his devoted assistants did so much.^ 



1 Mr. O. A. Derby, Hartt's first assistant in the Brazilian Survey, was, after some 

 delay, appointed assistant director of the National Museum, where he has been able 

 to carry on more or less geologic work ever since the suspension of the survey in 

 1877. During the past few years he has been director of a geological survey of the 

 Province of San Paulo, where he is successfully carrying out in detail for that pro- 

 vince the very work that Hartt hoped to accomplish for the Empire. . . His 

 geologic work is the most thorough that has been done thus far in Brazil, almost all 

 that has been done hitherto partaking more or less of the nature of reconnaissances. 

 —Dr. J. C. Branner : Prof. Hartt in Brazil, in the Cornell Magazine. 



