56 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Dr. Brown also read a letter addressed by Darwin to Dr. Joseph 

 Leidy under date of March 4, 1860, acknowledging receipt of publi- 

 cations, expressing appreciation of Dr. Leidy's paleontological work, 

 and returning thanks for his support of the doctrine of Natural Selection. 



Edwin G. Conklin, Ph.D., then read a memoir of Darwin, dwelling 

 on the importance of his work in science and on the relation of the 

 doctrine of Natural Selection to modern thought. 



A collection of Darwin's works and his letter of acknowledgment 

 of election as Correspondent of the Academy were exhibited. 



The following were accepted for publication:" 



