78o PLANT RESPONSE 



Sugar, efiect of solution on growth, 482 

 Sunflower, impressed periodic movement in, 685 



l^amarindits ittdica, diurnal variation in the rate of growth of, 474 

 ,, ,, initiation of growth in, by stimulus, 425 



,, ,, response to thermal radiation, 617 



Temperature and growth, relation between : determination by Continuous 



Method, 446 

 ,, ,, ,, ,, determination by Discon- 



tinuous Method, 442 

 ,, ,, ,, ,, determination by Method of 



Balance, 450 

 ,, ,, ,, ,, determination by Method of 



Excitatory Response, 452 

 ,, and rhythmic frequency, relation between, 349 



,, effect of maximum, on arrest o^ Desviodium pulsation, 432 



,, ,, ,, on growth-arrest, 431 



,, ,, on cardiac pulsation, 333, 334 



,, ,, on Desmodiitm pulsation, 332-338 



,, ,, on intensity of minimally effective stimulus, 27 



,, ,, on latent period, 141, 268 



,, ,, on response, 140-146 



,, optimum, of growth, 449, 451 



,, variation, effect on growth, 615 



Tesia current, eff"ect of, on growth, 619 

 Tetanus in muscle, 98 

 ,, in plant, 99 



,, incapability of, in rhythmic tissue, 340 

 Thermal radiation, discrimination between effect of, and temperature, 615 



,, ,, growth-curvature induced by, 616, 617 



Thermo-crescent curve, 447 

 Thermographs, development of, 184 



,, of regional death, 183-186 



Thermo-mechanical curve, 160 

 Thermo-taxis, 698 



Thermo-tonic minimum in Biophytuiii, 305 

 ,, ,, in Desmodium, 305 



Tip of njot or shoot, electric response on stimulation of, 517, 518 



,, ,, mechanical response on stimulation of, 525, 526, 601, 606 



,, efiect on excitability on amputation of, 541 

 Tonic condition, modifying effect of, on relation between stimulus and response, 465 



,, ,, true meaning of, 307, 313 



Torsion, autonomous, 666 



,, ' ,, effect of electric current on, 670 



,, ,, ,, gravity on, 671 



,, ,, ,, light on, 669 



,, ,, ,, tenlperature on, 667 



Torsional response, laws of, 662 



,, ,, of compound strip, 660 



