440 



INDEX 



on, 360 ; chemotaxis of, 180, 348 ; con- 

 sistency of, 279/281, 282 ; movements 

 of swarm-spores of, 275 ; phototaxis of, 

 326 ; pulsating vacuoles of, 293, 294 ; 

 rheotaxis of, 356. 



Nabokich, 143. 



Nagel, 6, 216, 228, 229, 309, 320, 325, 326. 



Nageli, 12, 23, 75, 263, 271, 273, 274, 282, 

 311, 315, 318, 324, 334, 355, 357, 360 ; 

 on cilia, 265, 267, 268 ; on production* 

 of heat, 378, 379 ; on protoplasmic 

 movement, 276, 285, 287, 288. 



Nastic movements, definition of, 3. 



Nathansohn, 406, 407. 



Nawaschin, 276. 



Nees, 386, 387. 



Neger, 174, 257. 



Neljubow, 207. 



Nelnmbo nucifera, production of heat by, 



373- 



Nemec, 186, 207, 242, 243, 334, 336, 359, 

 418; on causation of tropism, 223, 

 224 ; on changes in geotropically excited 

 cells, 225 ; on localization of percep- 

 tion, 198, 199 ; on transference of 

 stimuli, 200, 201, 204. 



Nepenthes, aggregation in, 90 ; influence 

 of chemical excitation on, 88. 



Neptunia oleracea, 95. 



Nernst, 364. 



Nestler, 359. 



Neubert, 20, 165. 



Newcombe, 419 ; on indifference of radicles 

 to contact, 82; on rheotropism, 184, 

 185. 



Nicotiana rustica, sleep-movements of, 103. 



Nigella, movements of style of, 24. 



Niklewski, 79. 



Nitella, 308, 327, 328, 334; electrical cur- 

 rents in, 395 ; streaming in, 338, 357, 

 358 ; direction of, 283, 293 ; dura- 

 tion of, 285, 286 ; energy of, 288, 369 ; 

 influence of temperature on, 313, 

 3U, 3I5> 3i6; of light, and acids, 

 319 ; localization of, 287 ; rate of, 

 284, 288 ; seismonic irritability of, 

 66, 75, 99 ; transference of stimuli 

 in, 95, 201 ; N.flexilis, anaerobism of, 

 341 ; geotropism of, 165 ; heliotropism 

 of, 174 ; N. translucens, anaerobism 

 of, 341. 



Nitophyllum uncinatum, coiling of, 46. 



Nitrous oxide, influence of, on irritability, 

 144- 



Nitschiella, movements of, 271. 



Nitschke, 84. 



Noctiluca, 385, 388. 



Nodes, curvature of, 242 ; geotropism of, 

 200, 205, 231, 232, 235, 242 ; growth 

 of, during curvature, 240 ; ruptures due 

 to, 243. 

 Noggerath, 386, 387. 



Noll, 37, 192, 205, 218, 219, 220, 221, 225, 

 226, 227, 239, 257, 260 ; on causation 

 of geotropism, 223, 224 ; on cellular 

 changes during curvature, 240 ; on 

 changes of tone, 207, 208, 217 ; on 

 conjoint stimuli, 209 ; on diageotropism 

 of twiners, 37 ; on exotropy, 258 ; on 

 influence of gravity on sleep-move- 

 ments, 128; --of etiolation on cir- 

 cumnutation, 28 ; on summation, 210 ; 

 on tropic curvature, 161, 165, 168, 

 173, 174, 241-7, 255. 



Nordhausen, 46, 181. 



Nowakowski, 265. 



Nuclear division, 302 ; importance of, 303 ; 

 influence of streaming on, 285 ; of 

 temperature on, 317. 



Nucleolus, density of, 336. 



Nucleus, influence of stimulation on, 89 ; 

 on pulsating vacuoles, 298 ; move- 

 ments of, 275, 287, 301, 359 ; density 

 of, 336 ; as reflex centre, 10. 



Nutation, definition of, I ; movements, 

 influence of gravity on, 28 ; mechanics 

 of, 128; nature of, 12, 13; special in- 

 stances of, 21 ; undulating, 23. 



Nutrition, influence of, on streaming, 338. 



Nyctinastic, definition of, 97 ; movements, 

 108-12. 



Nyctitropic, definition of, 97. 



Nymphaea alba, photonasty of, 122; pro- 

 duction of electricity by, 398 ; ther- 

 monasty of, 113; N. blanda, sleep- 

 movements of, 103. 



Oedogonium, autonomic movements of, 20 ; 

 ciliation of zoospore of, 264 ; growth 

 and nutation of, 31 ; origin of move- 

 ments of, 15. 



Oels, 170. 



Oker-Blom, 390. 



Olax, 45. 



Olive, 326, 348, 356. 



Oliver (F. W.), 82, 118 ; on propagation of 

 stimuli in Masdevallia, 92, 93 ; on 

 sleep-movements, 102. 



Olivi, 324. 



Oltmanns, 20, 23, 100, 103, 106, 174, 206, 

 211, 232, 250, 252, 253, 255, 260, 261, 

 318 ; on closure of Tragopogon in 

 strong light, 108; on directive action 

 of light, 228 ; on movements of 

 flowers, 120; on photometry, 3; on 

 phototaxis, 323, 324, 331, 332; on 

 reversal of heliotropism, 171, 172. 



Onions, production of heat by, 375. 



Opalina ranarum, galvanotaxis of, 361, 



363- 

 Operations, influence of, on irritability, 198, 



199, 200, 203, 204, 205. 

 Opuntia, movement of stamens of, 82. 

 Orchids, changes of tone in, 205. 

 Orchis, 258. 



