TABLE OF CONTENTS 
Development of plant communities of a sand ridge 
region in Michigan (with twelve figures) - - 
Sulphur content of soils and its relation to plant 
nutrition. Contributions from the H 
Botanical Laboratory 297 (with one figure) - 
Effect of autolized yeast and peptone on growth of 
excised corn root — in the dark ae ia 
figures) - - 
Leaves of the Farinosae (with platesI-III) -_ - 
Inheritance of fruit shape in Curcubita = hs 
(with three figures) - - - 
Biochemistry of plant diseases. IV. Proxhunte 
analysis of plums rotted ed Sclerotinia cinerea 
(with two figures)-  - sc em tm ae 
“Magnesia injury” of plants grown in nutrient 
SOMItIONN «© 6 ee we oe 
Heterotheca Grievii the microsporange of Heter- 
angium Grievit (with a IV, V, and ies 
figures) - - - - - 
Early embryogeny of Reboulia pemienenvt ise 
forty-seven figures) -  - 
Specific acidity of water extract and oxalate con- 
tent of foliage of African sorrel (with one 
Microbiology of flax retting - - - - - 
Anatomy of a gall on Populus trichocarpa (with 
plate VI) a ee a 
Pollination in alfalfa (with five figures) - - - 
Protective power against salt injury of large root 
systems of wheat seedlings- - - - 
W. G. Waterman 
Scott V. Eaton 
Wm. J. Robbins 
Agnes Arber 
E. W. Sinnott 
J.J. Willaman and 
F. R. Davison 
W. F. Gericke 
Margaret Benson 
A. W. Dupler 
G. P. Walton 
Fred W. Tanner 
Karl C. Hyde 
F. A. Coffman 
W. F. Gericke 
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