1915.] 
NATURAL SCIENCES OF PHILADELPHIA. 
571 
Conchology, making the output of the year 2,027 pages and 85 
plates. 
The war has interfered with the distribution of these publications 
to correspondents as the International Bureau of Exchange has 
been forced to suspend communication with Belgium, Germany, 
Austria, Russia, Servia, Bulgaria, and Roumania. The several 
issues intended for these countries have, however, been directed and 
stored away in anticipation of the happier time when they can be 
sent to their destinations. 
Four members and ten correspondents have been elected. The 
deaths of thirteen members anil three correspondents have been 
announced. Resignations of membership were accepted from Walter 
M. James and Edwin B. Bartram. 
George Vaux, Jr., was reappointed by the Council the Solicitor 
of the Academy; Frank J. Iveeley was continued as Curator of the 
William S. Vaux Collections and Joseph Willcox as Custodian of the 
Isaac Lea Collection of Eocene fossils. Dr. Spencer Trotter was 
placed on the Library Committee to fill the vacancy caused by the 
death of Dr. Thomas Biddle. 
The following courses of lectures have been delivered in connection 
with the Ludwick Institute: Witmer Stone, three on wild bird life; 
B. Franklin Royer, one on housing in relation to health; F. Herbert 
Snow, one on Philadelphia’s water supply; Henry A. Pilsbry, three 
on problems in the study of faunas; Henry Skinner, three on ento¬ 
mology; Spencer Trotter, three on physiography and life relations 
of North America; Stewardson Brown, three on local wild flowers. 
In harmony with the original intention of the Ludwick Foundation, 
ten additional lectures were delivered on Wednesday afternoons 
up to March to the teachers and classes of the Girls’ High School. 
A Committee of Conference with one representing the American 
Entomological Society considered carefully a modification of the 
articles of agreement providing for the union of the Academy and 
the Society, but the result was not reached in time to be included 
in this report. 
Much the most important event in the history of the Academy 
during the past year was the adoption, January 19, of amendments 
to the By-Laws providing for the loaning of certain books from the 
Library, reducing the number of stated meetings to six, repealing 
the requirement of an initiation fee, and changing the procedure 
for the election of members. 
These amendments were adopted January 19 on the recommenda¬ 
tion of the Council and are as follows: 
