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 pubUcations 

 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 and 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. Keeley 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 phj^siography 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: 



