DATES OF PUBLICATION. 



An effort has been made to ascertain the time of issue of the several parts 

 of the Journal and Proceedings not otherwise dated, and with this end in 

 view the minutes, correspondence, and accessions lists of the Academy have 

 been diligently searched. It is to be regretted that the result is not complete, 

 but it is here given in the hope that it may establish dates of publication, at 

 least approximately, and help to determine questions of priority arising in 

 connection with the scientific contributions to the three series now indexed. 



It may be assumed that the undated portions appeared between the dates 

 immediately preceding and following the omissions. 



When a date is established by a letter of acknowledgment it is necessarily 

 later than the actual distribution of the part. While therefore, the dates of 

 publication were frequently earlier than those here given, they were certainly 

 never later. 



The entries referring to the publication of the first series of the Journal, 

 Volumes II- VI, were compiled by John S. Phillips and published in the 

 first volume of the Proceedings. Many of the contributions to the second 

 series of the Journal, when supplied to the authors in advance, were 

 dated in the table of contents, this being uniformly the case since the 

 publication of Volume VI. The issue to authors of separate copies of papers 

 from the Proceedings also antedate the publication of the numbers of which 

 they form a part, the record being printed on the covers of the separata but 

 not otherwise preserved. 



Acknowledgment is due the Assistant Librarian, William J. Fox, for the 

 compilation and arrangement of the following list. 



JOUENAL, 1817-1845. 



Vol. I, Part 1. Presented to the Academv meeting, May 20, 1817. 

 2. 

 3. 

 4. 

 5. 

 6. A copy sent by Say to Melsheimer, November 7, 1817. 



Vol. II, pages 1- 32, published January, 1821. 



33- 64, " February, 1821. 



65- 96, " March, 1821. 



97-128, " October, 1821. 



129-160, " November, 1821. 



161-192, " December, 1821. 



193-224, " June, 1822. 



225-256, " July, 1822. 



257-288, " August, 1822. 



289-320, " September, 1822. 



321-352, " November, 1822. 



353-408, " December, 1822. 



(vii) 



