344 [March 



A letter requesting an exchange of publications was re- 

 ceived from the Imperial Library at St. Petersburg, dated 

 January 10-22, 1864. On motion, the Imperial Library was 

 ordered to be placed on the list of correspondents. 



A letter from Dr. Leidy to the Secretary, dated Phila- 

 delphia, February 23d, 1864, was read and referred to the 

 Curators for action. 



A letter from Prof. Haidinger to the Secretary, dated 

 Vienna, February 9th, 1864, was read, inclosing a list of 

 contributors to the Von Martius Festival Medal, On motion, 

 the list was ordered to lie on the table, to afford members an 

 opportunity to subscribe. 



Donations for the Library were announced from Prof. 

 Zantedeschi, the Royal Astronomical Society'', the Essex 

 Institute, the Academy of Natural Sciences at Philadelphia, 

 Dr. B. II. Coates, Senator Wilson, and the National Ob- 

 servatory, 



Photographic portraits of Leo Lesquereux, Isaac Lea, and 

 Elias Durand, members, were presented for the Album. 



The death of Prof. Edward Hitchcock, a member, at 

 Amherst, Massachusetts, on the 27th ult., aged 70 years, 

 was announced by the Secretary. 



The Committee to which was referred the paper on Grave 

 Creek Mound reported against its publication and were dis- 

 charged, their report having been accepted and approved. 



The report of the Board of Secretaries on the communica- 

 tion received from the Royal Society, was, on motion, adopt- 

 ed, as follows: 1. That they are prepared to furnish to the 

 Royal Society a supplementary list of American Journals and 

 Societies to complete their catalogue of scientific memoirs. 

 2. That they recommend to the Society to offer to prepare, 

 at the expense of the Royal Society, a catalogue of papers 

 contained in such volumes of said list as the Royal Society 

 may indicate. 



Dr. Cresson exhibited his improved magnifying and polar- 

 izing oxyhydrogen apparatus. On motion of Dr. Bache, the 

 thanks of the Society were presented to Dr. Cresson for the 



