INDEX 



373 



Chodat and Bach, on oxidase, 271 

 Cholodny, on geotropism, 328 

 on growth hormone, 287-288 

 Chromogens, respiration, 271-272 

 Chromoplasts, 17 

 Climbing movements, 333-335 

 Coagulation, of protoplasm, 123-124 

 Cobalt-chloride method, 158 

 Co-enzymes, 215 

 Colloidal osmotic system, of cell, 



101-129 

 Colloidal state, general conception of, 



102-107 

 Colloids, fundamental properties of, 



102-107 

 Combes, on light and shade plants, 



39-40 

 Compensation point, in light effect 



on respiration, 277 

 Composition, elemental, of planto, 7 

 Compression of vessels, 191-193 

 Crocker, on artificial light for plant 



growth, 42 

 Culture, plant, methods of, 81-82 

 Cuttings, 358-362 

 Cytase, 206-209 



D 



Darwin, on geotropism, 326-327 



on phototropism, 317 



on porometer, 168 



on traumatropism, 332 

 De Condolle, on phototropism, 318 

 Dendrograph, 191-192 

 Developmental cycle, of higher 



plants, 342-345 

 De Vries, on osmotic pressure in 

 cells, 114, 116 



on plasmolysis, 117 

 Dewar's flask, 253 

 Diastase (see Amylase). 

 Diffusion, 109 



through cell membranes, 108-109 



of gases through small openings, 

 35-36 

 Disaccharides, hydrolysis of, 206-209 

 Dispersion, medium, 103-104 



phase, 103-104 



Dissolving action of roots, 78-79 

 Dixon, on rise of water, 190-191 

 Dodder, 240-241 

 Doiarenko, on pot cultures, 81 

 Donnan's membrane equilibrium, 



119-123 

 Dormancy, of seeds, 295 

 Drouth resistance, 178-180 

 Dutrochet, on osmosis, 109, 110 



on rise of sap, 140 

 Dutrochet's osmometer, 11 



E 



Electric light, growth by, 42 

 Elemental composition of plants, 17 

 Embryo development, physiological 



process of, 352-355 

 Emulsoids, 104 

 Endosmosis, 109 

 Energy absorbed, relation to stored 



energy, 31-34 

 Engelmann, on carbon assimilation, 

 17 



on chloroplast pigments, 22 



on light absorption, 33 

 Enzymes, adsorption of, 211 



in alcoholic fermentation, 261-265 



general properties of, 209-215 



hydrolytic, 206-209, 216, 224-225 



methods of isolation and purifica- 

 tion, 209-215 



oxidizing, 270-272 



proteolytic, 224-225 



in respiration, 270-271 



reversibility of action of, 213-214 



in saprophytes, 235 



specificity of, 213-214 

 Ephemeral plants, 176 

 Epiphytes, 150 

 Etherization, 291-292 

 Etiolation, 22 



relation to growth, 302-303 

 Eudiometer, 12 

 Excitation of protoplasm, 317 

 Exosmosis, 109 



Exudation pressure and suction ten- 

 sion of roots, 136-139 



