INDEX 



Ectoplasmic membrane, irritability of, II. 



Ehrenberg, 383. 



Eicholz, 148. 



Eijkmann, 382, 385, 387. 



Elasticity, changes of, during curvature, 



245, 246. 



Electrical actions in plants, 400 ; con- 

 ductivity, 392 ; - currents, influence 

 of, on movement, 145, of Desmodium, 

 30 ; - - on streaming, 290, 292 ; - - on 

 surface-tension, 278 ; shock-action of, 

 360 ; tactic action of, 361-4; -- poten- 

 tial, differences of, 391 ; tropic action 

 of, 41 9. 



Electricity in plants, detection of, 393, Fig. 

 68, 394 ; influence of anaesthetics on, 

 396, of injuries on, 397, of oxygen on, 

 395, of photosynthesis on, 396, of tem- 

 perature on, 395, 396, of water move- 

 ments on, 396 ; sources of, 388, 389, 

 390, 391 ; uses of, 392. 

 Electricity, static, tropic action of, 188, 189. 

 Electrolysis, curvatures due to, 422 ; move- 

 ments due to, 360. 



Electromagnetic streaming, 290, Fig. 50. 

 Elfving, 164, 174, 204, 207, 228, 231, 245, 

 332, 421 ; on hydrotropism and gal- 

 vanotropism, 188 ; on maximal geo- 

 tropic angle, 217 ; on phototaxis, 323; 

 on tropic aggregation of protoplasm, 

 219; on Weber's law, 213. 

 Ellis, 264 ; on immotility, 306. 

 Elodea, orientation of chloroplastids of, 

 220, 327,328, 338; streaming in, direc- 

 tion of, 283, 293 ; distribution of, 286 ; 

 duration of, 285 ; influence of light on, 

 319, 320 ; of temperature on, 313 ; rate 

 of, 284, 288 ; C. canadensis, nuclear 

 movements of, 275 ; streaming in, 357, 



359- 

 Empusa mitscae, dispersal of, 150. 



Emulsions, importance of, 281 ; in stream- 

 ing protoplasm, 291, Fig. 51 ; surface- 

 tension forces in, 282, 283. 



Energy, chemical, 405 ; consumption of, 

 by streaming protoplasm, 288 ; osmotic, 

 402 ; sources and transformations of, 

 399, 400 ; surface-tension, 404. 



Engelmann, 6, 208, 263, 269, 270, 272, 

 273, 282, 290, 299, 309, 318, 347, 352, 

 355. 35 8 . 36o 367 ; on chemotaxis, 

 180; on phobic movements, 320, 321, 

 322, 326. 



Enteromorpha compressa, 324. 



Ephemeral flowers, 19; movements, 23. 



Epicotyl, curvature of, on klinostat, 27 ; 

 heliotropism of, 194. 



Epidermis, influence of, on geotropism, 

 242 ; on production of electricity, 398. 



Epilobium, movements of stigma of, 24 ; 

 origin of movements in flower of, 27. 



Epinasty, definition of, 3 ; in horizontal 

 branches, 254, 255 ; influence of, on 



curvature, 23; - of light on, 257; 



importance of, in orientation, 159 ; in 



ivy, 253 ; in leaves, 256. 

 Epistrophe, 333. 

 Equinoctial flowers, 19. 

 Equisetum, heliotropic rhizoids of, 174. 

 Erica, orientation of leaves of, 255. 

 Eriksson, 164, 370, 374, 378. 

 Ermann, 278. 

 Ernst, 304. 

 Erodium gruinum, hygroscopic awns of, 



146, 151, 152. 

 Errera, 82, 184, 302 ; on curvature of stems 



of trees, 12, 232. 



Eruum lens, thermotropism of, 177. 

 Erythrotrichia, locomotion of, 265. 

 Esenbeck, 386. 

 Ether, influence of, on chemotaxis, 421 ; 



on irritability, 144; on phototaxis, 



421; on phototonus, 319, 320; --on 



streaming, 313,319,341 ; tropic action 



of, 182. 

 Ethereal oils, influence of, on absorption of 



heat, 380. 

 Etiolation, influence of, on circumnutation, 



28, 30 ; - - on curvature, 23 ; - on 



heliotropism, 229 ; on twining, 30, 



33, 35- 

 Euglena, 312, 317, 320, 324, 326; energy 



of cilia of, 268 ; function of eye-spot 

 of, 323 ; pulsating vacuoles of, 298 ; 

 E. viridis, 421 ; geotaxis of, 336, 337, 

 338 ; influence of oxygen on, 347, 349, 

 351; non-galvanotaxis of, 361; non- 

 rheotaxis of, 356; phototaxis of, 321. 



Euler, 393. 



Eiionymus radicans, orientation of leaves 

 of, 259, Fig. 48. 



Euphorbia lafhyris, rise of temperature in, 



373- 



Ewart, 26, 124, 272, 306, 307, 367, 400, 

 404, 408, 420 ; on ascent of water, 

 410, 411 ; on attaching disks, 33, 47 ; 

 on coiling roots, 46 ; on consumption 

 of energy, 369 ; on correlation of 

 growth, 415 ; on decomposition of 

 chlorophyll by light, 333 ; on diffusion, 

 285, 359, 409, 410 ; on discriminatory 

 power of tendrils, 48 ; on electrical 

 conductivity of cell-constituents, 392, 

 393 ; on formation of red wood, 416; 

 on galvanotropism, 422 ; on heat pro- 

 tection, 380 ; on hook- and petiole- 

 climbers, 45, 237 ; on influence of 

 darkness on phototonus, 142 ; of 

 density and viscosity on movement 

 in cell, 334, 335 ; -- of strains on thick- 

 ening of cell-wall, 245 ; -- of light on 

 streaming, 321 ; on length of vessels 

 in climbers, 33 ; on localized percep- 

 tion, 196 ; on magnetotropism, 189, 

 222; on nuclear movements, 301, 302; 

 on orientation of chloroplastids, 327, 



