INDEX 



Absorption by insectivorous plants, 186. 



Absorption, in the soil, 92, 93 ; of light, by 

 chlorophyll, 129; of heat, 398. 



Acceleration of growth, in geotropism, 434 ; 

 in hapiotropism, 493 ; in nyctitropism, 

 501 ; by stimuli, 300. 



Accumulation of materials in cells, 20. 



Acetic acid, Bacteria, 216 ; as a product of 

 fermentation, 216, 218 ; oxidation of, 216, 

 218. 



Acids, organic, see Organic acids. 



Acquired characters, inheritance of, 391. 



Acropetal, 274. 



Action, physiological, at a distance, 485. 



Activities of the organism, 247, 397. 



Adaptation, capacity for, 389, 391 ; here- 

 ditary fixation of, 389. 



Adapt-uions, 389 ; active, 389 ; to external 

 factors, 389 ; inheritance of, 391 ; to con- 

 centration, 179 ; to locality, 253 ; direct, 

 254; functional, 251, 331, 391; inheri- 

 tance of functional, 392 ; passive, 390 ; 

 inherited, 254. 



Adaptive characters, 386. 



Adventitious origin, of growing points, 284 ; 

 of embryos, 370. 



Aerial roots, heliotropism in, 461 ; growth 

 in, 289. 



Aeriferous system, 37. 



Aerobionts, 213, 526. 



Aerotaxis, 105, 542, 547. 



Aerotropism, 484. 



After-effect of external factors in geotropism, 

 437 ; in adaptations, 390, 392 ; in periodic 

 phenomena, 343 ; in periodic movements, 

 508. 



Aggregation of protoplasm in Drosera, 498. 



Agriculture and nutrient materials, 101. 



Air-bubbles, counting of, in assimilation, 

 104. 



Albumins, 140. 



Albumoses, 139. 



Alcohol, in fermentation, 208; in intra- 

 molecular respiration, 203. 



Alcoholase, 212. 



Alcohols, higher, in fermentation, 214. 



Aleurone, 160. 



Alinite, 235. 



Alkaloids, 4, 176. 



Alpine plants, 319. 



Alternation of generations, 358. 



Aluminium, 86. 



Amide- organisms, 181, 241. 



Amido-compounds, 4, 139; assimilation of, 

 143 ; formation of, 173 ; as reserves, 163; 

 transformation of, in seedlings, 173 ; 

 Iran slocat ion of, 167. 



Ammonia, assimilation of, 135; formation 

 of, from urea, 224 ; formation of, from 

 peptone, 200 ; oxidation of, 228 ; occur- 

 rence of, in nature, 135 ; occurrence of, 

 in the soil, 137. 



Amoeboid movement, 534. 



Amphibious plants, 253. 



Amphimixis, 371. 



Amylase, 152. 



Anaerobes, 213; biological significance of, 

 215; oxygen requirements of, 215; in- 

 jurious influence of oxygen on, 215. 



Anaesthetics, see Narcotics. 



Analysis, see Composition. 



Anaphase in nuclear division, 268. 



Aniline dyes, osmosis of, 20. 



Anisophylly, 313. 



Annual periodicity, see Periodicity ; an- 

 nual rings, 350. 



Anthers, dehiscence of, 416. 



Anticlinal, 280. 



Antienzymes, 156. 



Apex, 273, 331. 



Apical cell, 279; growth, 261. 



Apogamy and apospory, 359. 



Apposition, see Cell-wall, Growth. 



Archegonium, 359, 361. 



Arginin, 140, 1 60, 174. 



Arrangement of lateral organs, 274. 



Articulations of leaves, 454. 



Asci, ejection of spores from, 422. 



Ash, 77-102 ; non-essential constituents of, 

 86 ; origin of, 77 ; amount of, 79, 80 ; 

 dependent on substratum, 79 ; dependent 

 on transpiration, 79; essential constituents 

 of, So, 8 1 ; nature of, 78. 



Asomatophytes, 273. 



Asparagin, 143, see Amido-compounds > 

 accumulation of, in darkness, 174; in- 

 fluence of, on diastase, 152 ; as a nutrient. 

 144, 182. 



Assimilation, products of, transformation of, 

 147 ; of materials of the ash, 83, 178 ; of 

 carbon by autotrophic plants, 102, see 

 Carbon-dioxide ; by heterotrophic plants, 

 178; of nitrogen, see Ammonia, Aspara- 

 gin,Amido compounds, Proteid, Nitrogen, 

 Peptone, Nitric Acid ; proper, 259 ; pro- 

 ducts of, in carbon-dioxide decomposi- 



