CONTENTS 
Further experiments on correlation of growth in 
Bryophylium calycinum (with seventeen figures) 
The separation of oxidase reactions from the cata- 
lase reaction es een gures) - 
Some f. g fixation and nitri- 
fication he Tae oe - 
nap tn bagi in Senet —— vith four 
figures - 
Sterility as the result of hybildization and the con- 
dition of pollen in Rubus (with plates X~XII) 
Further observations on chloranthy in Drosera 
intermedia (with plate XIII and three figures) 
A contribution to our knowledge of Splachnidium. 
Contributions from the Hull Botanical Labora- 
tory 220 (with plates XIV-XVIII) - - - 
The relation between oxidase and catalase in plant 
tissues (with one figure)- - - - - - 
Some recent investigations in nee -beet A Spo 
(with fifty-one figures) - 
Pollen sterility in relation to the giacalaees dis- 
tribution of some Onagraceae lets om 
XIX~XXI and one figure) - - 
The epidermal cells of roots. Contributions from 
e Hull Botanical eenmanetd 221 (with 
pa figures) - - . -  - 
BRIEFER ARTICLES— 
Quadrat studies in a mountain grassland- - - 
Thomas Jonathan Burrill (with eS <* 
The Hall Herbarium - - ee, te 
The staining of wood fibers for dence ee micro- 
scopic mounts - - - - 
Anew hybrid Columbine - - - - - = 
An Alternaria on Sonchus (with one figure) - - 
Octave Lignier (with portrait) me ER ea) & 
CuRRENT LITERATURE - - =, - 
For titles of book reviews see index under 
author’s name and reviews 
Papers noticed in “Notes for Students” are 
indexed under author’s name and subjects 
[VOLUME LXII 
Jacques Loeb 
G. B. Reed 
Bruce Williams 
A. H. Graves 
Carl S. Hoar 
Michael Levine 
Mabel L. Roe 
G. B. Reed 
F. J. Pritchard 
Carl C. Forsaith 
Edith A. Roberis 
’ Francis Ramaley 
William Trelease 
C. F. Millspaugh 
H. N. Lee 
T. D. A. Cockerell 
John A. Elliott 
E. C. Jeffrey 
PAGE 
293 
- 75, 156, 240, 320, 417, 509 
