KEPORT OF THE SECEETAEY 21 



his duties at the survey, he devoted much time and effort to the up- 

 building and care of these collections, the early reports of the divi- 

 sion testifying to his personal activities. His official retirement from 

 the Government service did not affect his interest, which never 

 flagged. He visited the department frequently, giving freely of the 

 store of knowledge acquired by his long years of service. 



Doctor Clarke was also greatly interested in the collection of 

 meteorites, was instrumental in adding to it a number of specimens, 

 and prepared a catalogue which was published as a part of the 

 Smithsonian Report for 1886, 



Doctor Clarke was a graduate of Harvard, had many honorary 

 degrees, and was affiliated with several of the prominent scientific 

 societies. He was the author of numerous papers, his Data of Geo- 

 chemistry being a standard reference work. 



Respectfully submitted. 



C. G. Abbot, Secretary. 



