INDEX OF SUBJECTS 
PAGE 
Algal Ancestors, see Thalassiophyta 
Biochemistry of Carbohydrate Production in the Higher Plants 
from the point of view of Systematic Relationships, The— 
F. F. Blackman ...... 2 
Camera Lucida drawing, An Easy Method of (2 Text-figs.)— 
James Small . . . ... . *238 
Campanula rotundifolia L., see Stomata 
Carbohydrate Production, see Biochemistry 
Cheiranthus cheiri L., see Unusual Plant 
Coelastrum , see New Species 
Crotalaria burhia Ham.* A New Method of Vegetative Multi¬ 
plication in (1 Plate, 1 Text-fig.)—R. H. Dastur and W. T. 
Saxton ........ 228 
Cutin, see Suberin 
Diffusion, see Permeability (Chap, iv) —Walter Stiles . .137 
Easy Method of Camera Lucida drawing, An (2 Text-figs.)— 
James Small ....... 238 
Evolution, see Genetics 
Evolution, see Human Implements 
Exudation, see Osmotic Pressure 
Factors Controlling the Periodicity of Fresh Water Algae in 
Nature, A Study of Some of the—William J. Hodgetts 
I-VI (3 Text-figs.) . . . . *150 
VII-XVI (6 Text-figs.).195 
Fresh Water Algae, see Periodicity 
Genetics and Evolution, by A. L. and A. C. Hagedoorn [Review] 
—A. G. T(ansley) . . . . . .124 
Geotropic Response in the Stem, The Reversal of (1 Plate)— 
M. J. Lynn . . . . . . .116 
Geotropic Response, The Theory of—V. H. Blackman 38, 246 
Geotropism, see Hydrion 
Germination in its Electrical Aspect, by A. E. Baines [Review] 
—S. M. W(adham) ...... 136 
Grouping of Vascular Plants, The (1 Diagram)—Margaret 
Benson . . . . . . .82 
