INDEX 



Inhibiting agents, 156. 



Initials, 371 ; latent, 374, 377, 395. 



Inorganic constituents, see Ash. 



Insectivorous plants, 184 ; movements in 

 response to stimuli in, see Drosera ; diges- 

 tion of proteid by, 185. 



Intercalary growing points, 273, 291 ; 

 growth, 259-63. 



Intercellular protoplasmic threads, signi- 

 ficance of, for conduction of stimuli, 475 ; 

 significance of, for translocation of mate- 

 rials, 170. 



Intercellular spaces, 37, 104, 120, 199, 296. 



Intermittent stimulation, 439. 



Intra-molecular respiration, 203 ; relation to 

 fermentation, 207 ; products of, 203. 



Intussusception, see Cell-wall. 



Inulin, 162. 



Invertase, 152. 



Ions, 1 6. 



Iron, 85 ; -bacteria, 224. 



Kinoplasm, 369. 



Klinostat, 430 ; theory of, 438, 449. 



Lactic acid fermentation, 217. 



Lactose, 210. 



Latent characters, 376. 



Latent period, 437. 



Lateral roots, geotropism in, 446. 



Laticiferous tubes, 172. 



Leaf-fall, 351. 



Leaves, 277 ; acropetal expansion of, 292 ; 

 assimilation of carbon-dioxide by the, 

 107, 251 ; absorption of ammonia by the, 

 137 ; materials of the ash by the, 78 ; of 

 carbon-dioxide by the, 1 20 ; of organic 

 substances by the, 112, 186 ; of water by 

 the, 33 ; translocation of materials from 

 the, 162 ; movements of, due to stimuli, see 

 Stimuli ; autonomous, see Autonomous ; 

 etiolation of, 305 ; light position of, 464, 

 466; regeneration of, 329; growth of, 

 292-4 ; formation of, 281 ; climbers, 495 ; 

 arrangement, 275 ; mechanical theory of, 



Leaves, unfolding of, 292. 



Lecithin, 4. 



Leguminosae, nitrogen fixation in, 237. 



Leucin, 140, 144, 174. 



Levulose, as a chemical stimulus, 317; see 

 Carbohydrates. 



Lichen-symbiosis, chemistry of, 243 ; mor- 

 phogenic results of, 325. 



Life, interpretation of, 254 ; causes of, 254; 

 conditions of, 298 ; duration of, 351. 



Light, absorption of, in carbon assimila- 

 tion, 130; influence of, in flower forma- 

 tion, 364 ; in protoplasmic movement, 

 540 ; intensity of, significance of, in car- 

 bon-dioxide assimilation, 125 ; on forma- 

 tion, 306, 310; on growth, 301, 302; pro- 

 duction of, 401 ; quality of, influence of, 



in carbon-dioxide assimilation, 126 ; in 

 formation of chlorophyll, 311 ; in forma- 

 tion, 311; in growth, 310; direction of, 

 influence of on movements, see Helio- 

 tropism, Phototaxis ; influence of, on 

 polarity and symmetry, 310 ; as inhibit- 

 ing growth, 303 ; energy of, in relation to 

 carbon-dioxide assimilation, 130 ; amount 

 of, made use of, 307 ; position of leaves, 

 466; alteration in, influence of, on growth, 

 343 ; as a stimulus, see Nyctitropism, 

 Phototaxis, Apobatic. 



Lime, 98. 



Limiting angle, 449 ; in geotropism, 446. 



Lipase, 152, 159. 



Lithium, 83. 



Locomotion, 405 ; autonomous, 532 ; in- 

 duced, 532, 541. 



Longitudinal growth, 286 ; measurement 

 of, 286 ; secondary, 295 ; distribution of, 

 in the stem, leaf and root, 290, 291. 



Magnesium, 84. 



Malformations, due to mutation, 393. 



Malic acid, chemotaxis by, 543. 



Maltose, derived from starch, 150. 



Manganese, 87. 



Mannite, 112, 175, 179. 



Manuring, 101. 



Mass, movement of water in, 47 ; of nu- 

 trients, 170. 



Material and form, 256. 



Materials, absorption of, by land plants, 

 24 ; by the cell, n, 24 ; translocation of, 

 1 66 ; organs concerned in, 169, 170 ; 

 causes of, 167-9. 



Maximum, see Cardinal points. 



Mechanical stimuli, see Pressure, Contact, 

 Shock, Tension. 



Mechanism, structure of, 522. 



Mechanism and organism, 255. 



Merogeny, 371. 



Metabolism, 2. 



Metamorphosis, I, 247, 249, 256. 



Metamorphosis, due to gall insects, 320; 

 natural, 349. 



Metamorphosis of organs, due to correla- 

 tive influences, 330 ; due to intensity of 

 light, 310 ; due to Fungi, &c., 321. 



Metaphase, in nuclear division, 268. 



Methane, in fermentation of cellulose, 218 ; 

 derivatives of, as nutrients, 180. 



Methods of Physiology, 2. 



Micella, 407. 



Mimosa, chemical stimulation of, 516 ; 

 nyctitropic movements in, 504 ; periodic 

 movements in, 510; movements in re- 

 sponse to shock in, 516 ; significance of, 

 513; mechanics of, 514; resistance to 

 flexion in, 514 ; transmission of stimulus 

 in, 518 ; in response to wounds in, 516. 



Minimum, see Cardinal points ; law of the, 



