INDEX 



555 



Thermo-electric apparatus, 291. 

 Thermometers, 201. 

 Thermo-regulators, 202. 

 Thermostats, 202. 

 Thermotropism, 478. 

 Titrating apparatus, 267. 

 Titration, method, 267, 326. 

 Torsions, 388. 

 Tracheides, 232. 



Translocation of plastic substances, 

 346. 



in leaves, 347. 



in branches, 349. 



Transmission of stimulus in helio- 

 tropic nutations, 474. 



of stimulus in Mimosa, 537. 

 Transparency of plant tissues, 14. 

 Transpiration, influence of external 

 conditions upon, 216. 



and organisation of plants, 209. 



and stomata, 213. 



experiments, 212. 

 Trophotropism of plasmodia, 435. 

 Turgor, 150. 



-extension of growing plant 

 structures, 364. 



Variation movements, 527. 



movements brought about by 

 changes in illumination, 527, 

 528, 534. 



movements brought about by 

 shocks, 536, 538. 



movements, causes of, 529. 



movements, influence of exter- 

 nal conditions upon, 540. 



Variation movements, spontaneous, 



539. 



Vessels of wood, length of, 178. 

 Vorkriimmung in twining plants 



490. 



Warm chamber, 421. 



Washing cylinder, 78. 



Water, absorption of, by fruits, 190. 



absorption of, by leaves, 186. 



absorption of, by mosses, 196. 



absorption of, by roots, 185. 



absorption of, by seeds, 190, 194. 



conduction of, in the stem, 225. 



food stuff's in, 80. 



mobility of, in the wood, 230. 



culture, method, 2. 



movement, rate of, 233. 



movement in the wood, causes 



of, 227 and Appendix 2. 

 Winding of tendrils, 496. 



of twining plants, 487. 



free, of twining plants, 492. 



mechanics of, 492. 

 Winter colouring of plant struc- 

 tures, 29. 



Withering of plants, 235. 

 Wood, as a tissue for the conduc- 

 tion of water, 225. 



behaviour of, towards gases 

 under pressure, 177. 



reactions of, 108. 



structure of, 109. 



Xanthophyll, 20. " 

 Yeast, nutrition of, 96. 



Butler & Tanner. The Selwood Printing Works, Frome, and London. 



