vi CONTENTS [VOLUME XXIX 
Some plants of New Mexico, - - - - - J. D.A. Cockerell 280 
Physiological Notes.—I. Soja beans for imbibition experiments. 
‘II. Gas diffusion through the cuticle. III. An artificial endodermis 
cell. IV. The self-registration of photosynthesis (with three figures), 
Edwin Bingham Copeland 347, 437 
A new species of Puccinia = - - - - H. Harold Hume 352 
The taxonomic value of the staminate flowers of some of the 
oaks (with eight figures), - HH”, W. Rowlee and Susie P. Nichols 353 
OPEN LETTERS— ; 
What is prunus institia ? 2 ie ‘ ‘ a F. A, Waugh 144 
The research station of the Royal Botanic Gardens of Ceylon, 
John C. Willis 202 
Pattern flowers and metamorphosis, ‘ : : Hl. H. Rusby 205 
Professor W. Pfeffer and the active albumin, - < Oscar Loew 357 
CURRENT LITERATURE — 
For titles see index under author’s name and Reviews. Papers noticed in 
“Notes for Students” are indexed under author’s name and subjects. 
NEWs—79, 150, 223, 296, 367, 447. 
DATES OF PUBLICATION. 
No. 1, January 31; No. 2, February 20; No. 3, March 26; No. 4, April 30; No 
5, May 25; No. 6, June 30. 
ERRATA. 
17, line 16 from above, for Weisner read Wiesner. 
61, No. 34, for Wurzelnspitze read Wurzelspitze. 
83, line 11 from above, for nucleus read nucleolus. 
89, line 18 from above, for adundant read abundant. 
91, line 20 from above, for cytolasm read cytoplasm. 
108, line 16 from below, for 26 read yy Pao 
115, line 7 from above, for soons read soon. 
121, line 13 from above, for plate V read plate 1X. 
126, second line from bottom, for periblem, terminal read periblem-terminal. 
135, lines 12 and 15 from above, for des read de. 
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