INDEX 



Absorption by insectivorous plants, i86. 

 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 materinls in cells, 20. 

 Acetic acid, Bacteria, 216 ; as a product of 

 fermentation, 216,218 ; oxidation of,2i6, 

 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. 

 Adaptations, 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 ; 



o^ 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, loi. 



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. 

 A leu one, 160. 

 Alinite, 235. 

 Alkaloids, 4, 176. 

 Alpine plants, 319. 

 Alternation of generations, 358. 

 Aluminium, 86. 

 Amide- organisms, 181, 241. 



Amido-com pounds, 4, 139; assimilation of, 

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

 transformation of, in seedlings, 173 ; 

 translocation 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. 



Ana';sthetics, 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, 160, 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, ^^ ; amount of, 79, 80 ; 

 dependent on substratum, 79 ; dependent 

 on transpiration, 79; essential constituents 

 of, 80, 81 ; 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- 



