INDEX 



507 



Swarm spores, protoplasm, 10; photo- 

 taxis, 182, 183. 



SZCZAWINSKA, light response of pig- 

 ment, 193. 



Tadpoles, salts of arsenic, 5 ; of heavy 

 metals, 14 ; varying density, 86 ; 

 geotaxis, 124 ; electrotaxis, 149 ; 

 growth and density, 367 ; light and 

 growth, 425, 4_:6, 432, 433 ; extent 

 of medium and size, 475, 478. 



TAMMANN, fluorine and growth, 317. 



Tannic acid, chemotaxis, 38. 



TAPPEIXER, fluorine and growth, 317. 



Tardigrades, desiccation, 61, 65; dry- 

 ing and heat resistance, 255. 



Tartaric acid, chemotactic, 38. 



Taurin, chemotactic, 38. 



Temperature, effect on toxic dose, 2 ; 

 increases osmosis, 83 ; T. and metab- 

 olism, 222, 223 ; and protoplasmic 

 activity, 229, 230 ; ultromaximum, 

 231, 234-237 ; ultraminimum, 239 ; 

 sudden change of, 460, 461 ; thermo- 

 tropism, 464. 



Temporary rigor, 242. 



Tendrils, twining, 377. 



Tension, effect on plasma, 374. 



Tetraspora, and density, 78, 89. 



Thalassicola, contact-response, 98, 99. 



Thermogenic food, 293. 



Thermotaxis, 105, 258, 261. 



Thigmotropism, 376, 383, 463, 465, 

 466. 



THOUVENIN, electricity and plants, 409. 



Threshold stimulus to chemical agents, 

 42. 



TIMIRIAZEFF, plant assimilation and 

 wave-lengths, 167, 169. 



TOLOMEI, magnetropism, 413. 



Tonotaxis, 89-91. 



Tradescantia hairs, oxygen, 2, 3 ; hy- 

 drogen, 5 ; ammonia, 6 ; chloro- 

 form, 9 ; molar agents, 102 ; electric 

 current, 132; cold-rigor, 241, 242; 

 cold, 247. 



Traumatropism, 384, 386. 



TREMBLET, phototaxis, 194. 



TREVIRANUS, temperature and metab- 

 olism, 223. 



TREW, light and growth, 421. 



Triton, electric stimulation, 137 ; ther- 

 motaxis, 261. 



Tritonium and sulphuric acid, 28. 



Trophotaxis, 39. 



Tropism, 484, 



Trout, light and growth, 426. 



TRUE, traumatropism, 384 ; electro- 



tropism, 410. 

 TSCHAPLOWITZ, moisture and growth, 



253. 



TSUKAMOTO, alcohols, 10-12. 

 Tubers, light and growth, 418. 

 Tubifex, poisons, 14. 

 Tubularia, oxygen and regeneration, 



306 ; potassium and regeneration, 



319. 



TUMAS, molar agents and growth, 371. 

 Tunicates, inorganic food of, 303. 

 Turbo, acclimatization to changed 



density, 56. 

 Twining stems, 376. 



Ulothrix, prototaxis of spores, 199. 

 Ultramaximum temperature, 234. 

 Ultraminimum temperature, 244. 

 Urea, attractive, 38. 

 Urostyla, thigmotaxis, 106. 



VALENTIN, cold, 241. 



Valeric acid, chemical response, 38. 



Vallisneria, cold-rigor, 241. 



VANDEVELDE, germination and con- 

 centration, 363. 



DE VARIGNY, varying density, 80 ; ac- 

 climatization to density, 85, 86 ; ex- 

 tent of medium and size of Limnsa, 

 475-478. 



VELTEN, cold-rigor, 241 ; temperature 

 and chlorophyll movements, 226, 

 227. 



Veratrin, poison, 24. 



VERNON, temperature and growth of 

 Echinoidea, 458. 



Vertebrates, chemicals, 25 ; electro- 

 taxis, 150 ; potassium on growth, 

 318 ; calcium as food, 321 ; organic 

 foods of, 334. 



VERWORN, chemotaxis, 33, 34 ; accli- 

 matization to changed density, 86; 

 phosphorescence, 98, 99 ; molar 

 agents, 100 ; thigmotaxis, 106 ; geo- 

 taxis, 121-123 ; electrical apparatus, 

 126; electric stimulation, 129-131, 

 134, 137 ; acclimatization to electric 

 current, 139, 140; electrotaxis, 141, 



