1915.] 
NATURAL SCIENCES OF PHILADELPHIA. 
573 
On the adoption of these amendments a new edition of the By- 
Laws was printed and distributed. 
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 
