1915.] NATURAL SCIENCES OF PHILADELPHIA. .573 



On the adoption of these amendments a new edition of the By- 

 Laws was printed and distril)uted. 



The usual societies have held meetings in the Academy during 

 the year. 



Edward J. Nolan, Recording Secretary. 



REPORT OF THE CORRESPONDING SECRETARY. 



The diminished volume of foreign correspondence and reduced 

 number of international scientific congresses commented upon in the 

 last annual report of the Corresponding Secretary were even more 

 apparent in 1915, inasmuch as the conditions were operative through- 

 out the entire year. 



Death collected an unusually heavy toll from the roll of corre- 

 spondents, including some of the most eminent, as follows: Leon 

 Vaillant, James Geikie, A. A. W. Hubrecht, Richard Lydekker, 

 Frederic W. Putnam, Theodor Boveri, George M. Sternberg, Edw. L. 

 Greene, Orville A. Derby, and H. E. Dresser. 



To insure a more systematic and careful examination into the 

 qualifications of proposed candidates for correspondents, a committee 

 of Council on the nomination of correspondents was appointed. 

 Upon the recommendation of this committee the following named 

 were nominated by the Council and elected by the Academy: 

 Alfred C. Haddon, Wilhelm Ludwig Johannsen, William Trelease, 

 Carl Diener, Samuel Wendell Williston, Charles E. Barrois, Thomas 

 Chrowder Chamberlin, Albrecht Penck, William Bateson, and Stanislas 

 Meunier. 



The principal invitations received during the year were to the 

 inauguration exercises of Edward Kidder Graham as President of 

 the University of North Carolina, at which Professor H. V, Wilson 

 served as the representative of this Academy; the twenty-fifth 

 anniversary of the founding of The Nebraska Academy of Sciences, 

 Professor George T. Moore being our representative; the commence- 

 ment exercises of the University of Pittsburgh; the twenty-fifth 

 annual meeting of the Ohio Academy of Science, to which Dr. Howard 

 Ayers went as our delegate; the fiftieth anniversary of the adminis- 

 tration of Alexander F.' de Waldheim as Director of the Imperial 

 Botanical Garden of Petrograd, which was acknowledged by a 

 letter of congratulation; and to the postponed meeting of the Nine- 

 teenth International Congress of Americanists, which is to convene 



