INDEX 



Mixing of initials, 371. 



Molecular weight, determined by plasmo- 

 lysis, 16. 



Mosaic hybrids, 373. 



Mosses, desiccation of, 317. 



Mould-fungi, nutrition of, 178. 



Movement, I, 403 ; active, 405 ; autono- 

 mous, 428 ; by torsion, 406 ; by curvature, 

 406 ; by twining, 406 ; rectilinear, 405 ; 

 hygroscopic, 410; induced, 428; rotatory, 

 455 ; locomotory, 428, 532 ; paratonic, 428 ; 

 passive, 405 ; causes of, see Cilia, Cohesion, 

 Protoplasm, Swelling, Turgor, Growth, 

 Shrivelling. 



Mucilage, as a reserve, 162. 



Multicellular formation, 271. 



Mutation, 393. 



Mycoderma, 180, 217. 



Mycorhiza, 240. 



Myxomycetes, alteration of form in, 247. 



Narcotics, chemotactical influence of, 542 ; 

 influence of, on assimilation, 195 ; on 

 respiration, 195, 202; on Mimosa, 516; 

 on perception, 527 ; on tendrils, 492 ; on 

 reaction, 527 ; on development of shoots, 

 345 ; want of, as a formal condition, 539 ; 

 osmosis of, 19. 



Nasties, 428, 449, 500, 530 ; transitions to 

 tropism, 499. 



Natatory movements, 532. 



Nectaries, 59. 



Night position, 500. 



Nitrate formation, 228. 



Nitric acid, assimilation of, 133 ; formation 

 of, 226; occurrence of, 135, 136. 



Nitrification, see Nitrogen-Bacteria. 



Nitrogen, assimilation of atmospheric, 232 ; 

 by autotrophic plants, 133, see Ammonia 

 and Nitric acid; in proteid formation, 

 138; by heterotrophic plants, 181 ; in- 

 fluence of light on, 142 ; organic com- 

 pounds of, 143; atmospheric, 134, 136, 

 232, 236 ; combination of, in soil, 233 ; 

 by Clostridium, 233 ; by Leguminosae, 

 237 ; by other Phanerogams, 239 ; by 

 Fungi, 235 ; manuring with, 138 ; gain 

 in, 135 ; etiolation in absence of, 315 ; as 

 a nutrient, 86; loss of, 136. 



Nitrogen-Bacteria, 228 ; respiration of. 229; 

 nutrition of, by carbon-dioxide, 228; 

 morphology of, 227 ; as nitrate formers, 

 226 ; as nitrite formers, 226 ; oxygen 

 requirements of, 226; injury to, by organic 

 substances, 224 ; occurrence of, 230. 



Non-cellular, 258. 



Nuclein, in sexual cells, 367. 



Nucleus, 6; division of, 268, 271 ; as the 



bearer of hereditary characters, 377. 

 Nutation, 293, 421 ; simple, 531 ; transi- 

 tory, 530 ; epinastic, 531 ; hyponastic 

 531 ; periodic, 530 ; revolving, 530 ; un- 

 dulatory, 531. 



Nutrients, incombustible, 86 ; combustible, 

 86 ; absence of, influence on growth, 



3I5- 

 Nutritive solutions for autotrophic plants, 



8 1 ; for heterotrophic plants, 178. 

 Nyctitropism, 500; cooling as a stimulus, 



502 ; significance of, 511 ; in flowers, 501 ; 

 heating as a stimulus in, 501, 505; of 

 foliage-leaves, 503 ; alteration in light as 

 a stimulus in, 502, 504 ; periodic move- 

 ments in, 509 ; backward curvature in, 



503 ; influence of gravity in, 508 ; varia- 

 tion movements in, 504; resistance to 

 flexion in the pulvinus in, 506 ; mechanics 

 of, 505. 



Oenothera, mutation in, 393. 



Oil emulsion, 538. 



Oils, ethereal, 4, 176 ; fatty, see Fats. 



Omnivora, 180, 182. 



Opening of flowers, 500. 



Optimum, see Cardinal points ; in inorganic 

 processes, 526. 



Orchidaceae, autonomous movements in 

 flowers of, 528. 



Organic acids, 4 ; formation of, by Fungi, 

 197 ; by succulents, 198 ; as nutrients, 

 178 ; osmotic activity of, 404 ; materials, 

 as nutrients in autotrophic plants, 112, 

 143 ; in heterotrophic plants, 177. 



Organic characters, 386. 



Organism and mechanism, 255. 



Organization, 9. 



Organs, formation of, in regeneration, 331 ; 

 at growing points, 274, 280, 281. 



Orientation, movements, 429. 



Orthotropic, 445. 



Osmosis, II. 



Osmotaxis, 548. 



Oxalic acid, 85, 197. 



Oxydases, 204. 



Oxygen, loosely combined, 215, 216 ; need 

 for by anaerobes, 215; for respiration, 

 192 ; for movement, 539 ; for fermenta- 

 tion, 212; for growth, 316; occurrence 

 of in the cell, 196 ; rigor, 526. 



Pangenesis, 391. 



Parasites, 178, 186. 



Parastichies, 275. 



Paratonic movements, 521. 



Parthenogenesis, 369. 



Partition walls, arrangement of, 270. 



Passive layers, 409. 



Pectin, 157; fermentation of, 218. 



Pepsin, 1 60. 



Peptone, 139, 178 ; organisms, 182, 241. 



Perception, 440, 469 ; see individual stimu- 

 lating agents ; distinct from reaction, 441 , 

 469, 527 ; apparatus, 441, 443> 5 2 3- 



Pericline, 280. 



Period, grand, 288, 529. 



O 



