INDEX 



557 



phic, 545 ; occurrence of, 542 ; Weber's 

 law, in relation to, 544. 



Chemotropism, 481 ; by gases, 484; by 

 dissolved bodies, 482 ; in Fungi, 482 ; of 

 pollen-tubes, 483 ; Weber's law in rela- 

 tion to, 483. 



Chlorine, 83. 



Chloroform, see Narcotics. 



Chlorophyll, chemistry and physics of, 107 ; 

 effect of darkness on, 308. 



Chloroplast, 6 ; as the organ for decomposi- 

 tion of carbon-dioxide, 107. 



Chlorosis, 85. 



Cholesterin, 4 ; in the plasmatic membrane, 

 22. 



Chromatin, 268. 



Chromosomes, 268 ; formation of, 377 ; as 

 hereditary agents, 377 ; number of, 368, 

 378. 



Cilia, as motile organs, 533. 



Circulation of protoplasm, 536 ; of carbon 

 and nitrogen, 243. 



Circumnutation, 529. 



Citric acid, 197. 



Climbing plants, 455. 



Closing of flowers, 500. 



Clostridium pasteurianum, 233. 



Cobalt-paper, 36. 



Coefficient, isosmotic, 16 ; economic, 191. 



Cohesion of water, significance of, in water 

 conduction, 65, 72 ; in dehiscence, 415 ; 

 in imbibition, 417. 



Cold rigor, 300. 



Collective species, 385. 



Colloidal solutions, 153. 



Colonies, 272. 



Colouring matters, 4, 176 ; formation of, in 

 darkness, 308 ; diosmosis of, 20. 



Combustion, chemical and physiological, 

 205. 



Comparison of intensities, 524. 



Compass plants, 466. 



Compensation, 330. 



Composition, chemical, 3, 5. 



Concentration, influence of, in osmotic pres- 

 sure, 15 ; on growth, 316; as a directive 

 stimulus, 546. 



Constructive material, 178. 



Contact stimulus, 490 ; movements in con- 

 sequence of, 487 ; organogenetic results 

 of, 314. 



Continuity of the embryonic substance, 

 284. 



Contractile layer, 411. 



Contractile threads, 268. 



Contraction ellipsoid, 410. 



Contraction in secondary growth, 295. 



Copper, 87, 88. 



Cork, 327. 



Correlations, 252, 326 ; demonstration of, 

 327,331,332; quantitative and qualitative, 

 330; as regulating growth, 252; in move- 

 ments due to stimuli, 524 ; causes of, 335 ; 



between leaves and buds, 330 ; between 



leaves and conductive strands, 330, 335 ; 



between buds, 329 ; between shoots, 330 ; 



between parts of the cell, 335. 

 Corrosion, of starch, 155 ; by the root, 95. 

 Corrosive sublimate, 87, 542. 

 Culture on solid substrata, 80 ; in aqueous 



solutions, 80. 

 Curvature, 406; geotropic, 431 ; work 



accomplished in, 437 ; course of, 432-5 ; 



heliotropic, 460-75; in shrivelling, 409; 



due to turgor and growth, 421 ; due 



to weight, 448. 



Cuscuta, carbon assimilation in, 188; twin- 

 ing of, 496. 

 Cuticle, permeability of aerial, 33, 38, 120; 



permeability of subterranean, 33. 

 Cydanthera, ejaculatory movements in, 425. 

 Cynareae, movements of the stamens in, 



due to stimulus, 519. 

 Cytase, 152, 158, 183. 

 Cytoplasm, 6. 



Daily periodicity, 508. 



Darkness, see Etiolation. 



Darkness-rigor, 302, 508. 



Darwinian theory, 384. 



Day position, 500. 



Day sleep, 505. 



Death, 351,362. 



Definite branches, 277. 



Denitrification, 232. 



Descent, theory of, 383. 



Deserts, 97. 



Desiccation, 34, 318 ; respiration during, 

 341. 



Desmodium, autonomous movements in, 

 528. 



Destructive metabolism, 207. 



Development, 250 ; of branches, see Bran- 

 ches, Growing point ; inhibition of, in 

 sexual cells, 371 ; stimuli inducing, 369. 



Dextrin, formed from starch, 150. 



Dextrose, see Carbohydrates. 



Diageotropism, 446. 



Diaheliotropism, 464. 



Diastase, 149, 152; nature of, 150; co- 

 ordinate formation of, 183 ; effect of tem- 

 perature on, 151 ; effect of accelerating 

 agents on, 151 ; effect of poisons on, 151; 

 occurrence of, 149, 164, 183. 



Diatomaceae, movements of, 534. 



Dichotomy, 274. 



Differentiation, 251 ; internal, 284, 296. 



Diffusion, 13; of carbon-dioxide, 120; as 

 an agent in transport of materials, 167 ; 

 as an agent in directive movements, 481, 

 542, 547- 



Diminution, harmonious, 315. 



Directive movements, 428. 



Disaccharides, hydrolysis of, 164. 



Dissimilation, 190. 



Dissociation, 16. 



