Matthews, J. R. Hybridism and Glassification in the 
Genus Rosa 
vii 
Page 
153 
Priestley, J. H. The Mechanism of Root Pressure (2 Text- 
figs.) 180 
Rea, M. W. See Small, J. 
Schuchert, Chas. The Evolution of Primitive Plants 
from the Geologist’s Viewpoint ••• 272 
S(kene), M. James William Helenus Trail [Obituary] ... 46 
Small, J. Preliminary Notes on Additional Evidence for 
the'Hydrion Differentiation Theory 
of Geotropism. 
Small, J. and Rea, M. W. I. On the Reversal of 
Geotropic Curvature in the Stem 208 
Small, J., and Lynn, M. J. II. On the Angle of 
Balance in Roots, Stems and Leaves 209 
Small, J. III. A Theory of the Origin of Leaves (3 
Text-figs.) ... ... ... ... 211 
Small, James. Preliminary Note on a Hydrion 
Differentiation Theory of Heliotro- 
pism ... ... ... ... 275 
Small, James. A Theory of Geotropism ; with some 
Experiments on the Chemical 
Reversal of Geotropic Response in 
Stem and Root (Plate 1 and 5 Text- 
figs.) ... • •• ... ... 49 
Small, J. Preliminary Note on a Hydrion Differentiation 
Theory of Heliotropism ... ... 275 
T(ansley), A. G. The Evolution of Plants [Review] ... 1 
T(ansley), A. G. Elementary Lecturing with the Help of 
Schedules [Review] ... ... 44 
Uphof, J. C. Th. Physiological Anatomy of Xerophytic 
Selaginellas (Text-figs. I—XII) ... 101 
West, C., Briggs, G. E., and Kidd, F. Methods and 
Significant Relations in the 
Quantitative Analysis of Plant 
Growth ... ... ... ... 200 
West, Cyril, See Kidd, West, and Briggs. 
