Pennsylvania for Sessions igoi-iQOj. li 



ceeds derived from it were to be devoted to increasing the 

 Bartram Memorial Library, in the Botanical Department 

 of the University. 



Dr. H. S. Conard Jien spoke on "The Comparative Struc- 

 ture of Fern Stems." Starting with such delicate types as 

 Schizaa and Hymenophyllum, he proceeded to such types 

 as Dicksonia, Acrostichum, Aspidium, Pteris, etc., and dis- 

 cussed recent views regarding the structure and arrange- 

 ment of their bundles, illustrating by a micro-lantern demon- 

 stration. 



Professor IMacfarlane described "The Comparative Struc- 

 ture of the Leaves of Tillandsia." The University party 

 recently collected at least thirteen well-marked species, and a 

 comparative description of these was given while reference 

 was made to Schimper's observations on the genus. A micro- 

 scopic demonstration was given of each species. 



February 7. Dr. Miller, President, in the chair. The 

 chairman announced that owing to a previously formed 

 pressing engagement, Provost Ilarrison, Honorary Presi- 

 dent, was unable to attend. The following office-bearers 

 were then proposed and duly elected : 



Honorary President, ex-ofUcio. — Provost C. C. Harrison. 



Acting President. — Dr. A. W. Miller. 



Vice-Presidents. — Dr. S. C. Schmucker, Dr. Henry Leff- 

 mann. 



Curator, ex-ofUcio. — Professor Macfarlane. 



Recording Secretary. — Professor Macfarlane. 



Corresponding Secretary. — Miss E. O. Abbot. 



Treasurer. — R. C. Banes, M. A. 



Council. — Roberts Le Boutillier, Dr. J. VV. Harshberger, 

 Dr. A. F. K. Krout, Miss Marion Mackenzie, Miss H. R. 

 Marshall, Dr. Jane V. Myers, T. Chalkley Palmer, Mrs. S. 

 T. Rorer, Mrs. M. E. Williams. Miss Anna Yarnall, Miss 

 Martha Hollinshead and Mr. O. P. Phillips. 



Dr. Ida Keller then spoke on "The Study of Yeast at the 

 Jorgensen laboratory at Copenhagen," where she successively 



