1912.] NATURAL SCIENCES OF PHILADELPHIA. 155 



justified in a feeling of pride in what he had accomplished. He had 

 made fruitful suggestions on the mechanism of inheritance based on 

 his studies of minute details of the structure of the germ cells; he had 

 investigated the anatomy of unsegmented worms, rotifers ; and spiders ; 

 he had made known many interesting habits of spiders and of birds ; 

 his breadth of outlook and of zoological knowledge was displayed in 

 his book on the analysis of racial descent in animals. 



From all that he had done we rightfully expected much to come 

 from his further researches, and our sorrow at his departure is made 

 keener by his fulness of promise. 



Moved that this be spread on the minutes of this meeting and that 

 the Corresponding Secretary send a copy to Mrs. Montgomery. 



April 16. 



Philip P. Calvert, Ph.D.. in the Chair. 



Twenty-seven persons present. 



The deaths of Miss Janes R. Haines, a member, November 11, 1911, 

 and of Prof. Rudolph Bastian, a correspondent, were announced. 



Dr. Spencer Trotter made a communication on some biological 

 aspects of population. (No abstract. )» 



The following resolutions were adopted: 



Resolved, That the Academy of Natural Sciences of Philadelphia 

 finds much encouragement and stimulus in the expressions of cordial 

 congratulation and recognition of its labors that reached it on the 

 occasion of the celebration of the centenary anniversary of its founda- 

 tion. 



f Resolved, That the Corresponding Secretary be instructed to convey 

 to corresponding institutions and members an expression of the 

 Academy's warm gratitude for their appreciation and courtesy. 



The following were elected members: 



John Ashhurst. 



Seth Bunker Capp. 



Walter N. James, M.D. 



Philip F. Kelly. 



Cecilia Baldwin McElrov. 



A. V. Morton, M.D. 



William H. Newbold. 



Harold Peirce. 



Hon. John M. Reynolds. 



Samuel C. Schmucker. 



Harriet Newell Wardle. 



