The following papers and discussions have been circulated to 

 some extent in the form of slips reprinted from the reports made 

 by the Secretary of the Society in the Boston Transcript. As 

 here presented, the papers are printed in full, and the discussions 

 are not only much fuller than in the weekly reports, but, where it 

 appeared necessary, have been carefully revised bj^ the speakers. 



The Committee on Publication aiid Discussion take this oppor- 

 tunity to repeat what they have before stated, that the Society is 

 not to be held responsible for the certainty of the statements, the 

 correctness of the opinions, or the accuracy of the nomenclature 

 in the papers and discussions now or heretofore published, all of 

 which must rest on the credit or judgment of the respective writers 

 or speakers, the Society undertaking only to present these papers 

 and discussions, or the substance of them, correctly. 



J. D. W. French, 

 C. MiNOT Weld, 

 B. M. Watson, Jr., 



Committee on 



Publication and 



Discussion. 



