Pennsylvania for Sessions 1901-1903. 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 then spoke on “The Comparative Struc- 
ture of Fern Stems.’’ Starting with such delicate types as 
Schizea and Hymenophyllum, he proceeded to such types 
as Dicksonta, 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 Macfarlane 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 Harrison, Honorary Presi- 
dent, was unable to attend. The following office-bearers 
were then proposed and duly elected: 
Honorary President, ex-officio —Provost C. C. Harrison. 
Acting President——Dr. A. W. Miller. 
Vice-Presidents——Dr. S. C. Schmucker, Dr. Henry Leff- 
mann. 
Curator, ex-officio.—Professor Macfarlane. 
Recording Secretary.—Professor Macfarlane. 
Corresponding Secretary.—Miss E. O. Abbot. 
Treasurer.—R. C. Banes, M. A. 
Council_—Roberts Le Boutillier, Dr. J. W. 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 
