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 oul}' much fuller than in the weekly reports, but, where it 

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



Tlie Committee on Publication and Discussion take this oppor- 

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

 not to be held responsible for the certaint}' of the statements, the 

 correctness of the opinions, or the accuracy' of the nomenclature in 

 the papers and discussions nowor heretofore published, all of which 

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

 speakers, the Societj' undertaking only to present these papers and 

 discussions, or the substance of them, correctly. 



O. B. Hadwen, 1 Committee on 



"William H. Hunt, V Publication and 

 Francis H. Appleton,J Discussion. 



