INDEX 781 



Torsional response, of Desmodium, 657 



,, ,, of Erythrina indica, 661 



,, ,, of Mimosa, 658, 659 



Transmission of heliotropic excitation, 604 

 Transpiration, automatic record of variation of, 371, 472 



,, effect of dissolved salt on, 383 



Transverse conduction of stimulation, 519, 528, 529, 532 

 Tropaolum majus, heliotropic response in : seasonal variation of, 623 



,, ,, ,, ,, variation of, with intensity of stimulus, 



623, 626 

 Turgidity, positive and negative variation : electrical indication of, 37, 41 



,, ,, ,, ,, induced changes of rate of growth by, 



426, 435 



,, ,, ,, ,, mechanical indication of, 37, 41 



,, response by artificial, 45 



Ulothrix, phototaxis of, 697 



Uniform response, 104 



Uriel is Lily, apogeotropic response of scape of, 500, 505 



,, periodic fatigue in the response of style of, 108 



Variation, induction of, by external forces, 750 

 Verworn on polar excitation of protozoa, 200 

 Vines on autonomous epi- and hypo-nasty, 643 



,, on protoplasmic irritability, 53 

 Vintschgau on velocity of nervous impulse, 246 

 Visual impulse, multiple, 286, 300 

 Vitalism, 740 



Vilis, heliotropic response of tendril of, 611 

 Vochting on theory of recti-petality, 594 



Water, excretion of, 396 



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