INDEX 



Absorption of gases, 161. 



of water by fruits and seeds, 

 190. 



of water by leaves, 186. 



of water by roots, 185. 



of water, work done in, 141. 

 Absorptive capacity of the soil, 244. 

 Accumulation of plastic material, 



360. 



Acidity of plant saps, 324. 

 Acids, formation of, in plants, 242. 

 Aerotropism of pollen tubes and 



fungal hyphse, 479. 

 After-effect movements, 528, 534. 



in flowers, 483. 



geotropic, 443. 

 Aggregations, 104. 

 Alcohol determination, 282. 



formation of, in plants, 284. 

 Aleurone grains, 120. 

 Algse, 427. 

 Alkaloids, 342. 

 Alkanna tincture, 307. 

 Ammonia as food for plants, 58, 71. 



detection of, 68. 

 Ammoniacal solution of Copper 



oxide, 28. 

 Amyloid, 303. 

 Amyloplasts, 120. 

 Amylum bodies, 16. 

 Anaerobic organisms, 285. 

 Aniline sulphate, 109. 

 Anisotropy, 509. 

 Annual period, 401. 

 Anthocyan, 340. 

 Aqueous tissue, 211. 

 Arc indicator, 377. 

 Ash analysis, 80. 

 Ash of plants, composition of, 77. 

 Asparagin, 254. 



behaviour of, in plants, 257. 



quantitative determination of, 

 255. 



Aspirator, 259. 



Asphyxiation of protoplasm, 423. 



Assimilation, 1. 



dependence of, on external con- 

 ditions, 50. 



organs of, 9. 



products of, 46. 



specific energy of, 48. 

 Atmospheric air, composition of, 



39. 



Attachment balls, 501. 

 Autumnal colouring of leaves, 29. 

 Auxanometer, 378. 

 Azotometer, 245. 



Bacillus subtilis, 98. 

 Bacteria, 97. 



pure cultures of, 98. 

 Bacterium method, after Engel- 

 mann, 38. 



Radicicola, 62. 



Termo, 98. 

 Bacteroids, 66. 

 Baryta water, 266. 

 Bast, structure of, 108. 

 Bell-glasses, doublB walled, 28. 

 Bichromate element, 136. 

 Biuret reaction, 249. 

 Bordered pits, 109. 

 Brucin, 68. 



Butyric acid fermentation, 285. 

 Bye-products as a means of pro- 

 tection, 344. 



of metabolism, 324. 



Cacao butter, 56. 

 Calcium as food, 84. 



oxalate, 73. 

 Cambium, 376. 

 Cane-sugar, tests for, 302. 

 Carbon dioxide, decomposition of, 

 in assimilation, 41, 44. 



detection of, 39. 



549 



