OF ARTS AND SCIENCES. 413 



Committee on Library. 



Edward C. Pickering, Henry P. Bowditch, 



William R. Nichols. 



Auditing Committee. 

 Henry G. Denny, Robert W. Hooper. 



Seven hundred and tlilrty-fourtli Meeting:. 



October 13, 1880. — Stated Meeting. 



The President in the chair. 



The President announced the death of Professor Haldeman, 

 Count Pourtal^s, Dr. C. T. Jackson, and Professor Benjamin 

 Peirce. 



The Corresponding Secretary announced that letters had 

 been received from Mrs. Miller, announcing the death of 

 Professor William Hallowes Miller ; M. Berthelot, acknowl- 

 edging election as Foreign Honorary Member ; and Mr. The- 

 odore Lyman, announcing the death of Count Louis Fran9ois 

 de Pourtales. 



The following gentlemen were elected members of the Acad- 

 emy : — 



Henry Williamson Haynes, of Boston, to be a Resident 

 Fellow in Class HI., Section 2. 



Arthur Auwers, of Berlin, to be a Foreign Honorary Mem- 

 ber in Class L, Section 2, in place of the late Christian 

 August Friedrich Peters. 



Alfred Louis Olivier Legrand des Cloizeaux, of Paris, to 

 be a Foreign Honorary Member in Class IL, Section 1, in 

 place of the late William Hallowes Miller. 



Professor Pickering presented, by title, the following pa- 

 pers : — 



" Determination of the Greatest Height, consistent with 

 Stability, that a Vertical Pole or Mast can be carried, and 

 of the Greatest Height to which a Tree can Grow." By 

 A. G. Greenhill. 



