index 779 



Shoshungraph, 364-371 



,, record by Hydraulic Balance Method, 368 



,, ,, Hydrostatic Balance Method, 368, 375 



Simultaneous mechanical and electrical records, 34 

 Sinapis nigra, effect of diffuse light on growth of, 572 



,, ,, negative heliotropic response of root of, 601 



,, ,, positive, dia-, and negative heliotropic response of, 609 



,, ,, positive heliotropic response of seedling of, 592 



Sodium carbonate, effect of solution of, on growth, 481 

 ,, chloride, effect of solution of, on growth, 484 

 ,, ,, ,, ,, on mechanical response, 551 



,, ,, ,, ,, on suction, 384 



Sphygmograph, 3 



Spirogyra, thermo-mechanical curve of, 170 

 Stahl on phototaxis, 697 

 ' Staircase ' response in galena, 121 

 ,, j, in muscle, 122 



,, ,, in plant, 104, 121, 122 



Stimulation, direct effect of, on growth, 434, 435, 436, 438 



,, ,, ,, on mechanical response, 47, 420 



,, effect of unilateral direct, on growth-curvature, 527, 529 



,, ,, ,, indirect, on growth-curvature, 525, 528, 529 



,, indirect effect of, on growth, 438 



,, ,, ,, on mechanical response, 47, 420 



,, minimally effective, 26 



,, ,, ,, variation of, at different temperatures, 27 



Stimulus, additive effect of, 94 



,, and response, relation between, 95, 96, 97 



,, ,, ,, ,, modified by tonic condition, 465 



,, bifurcation of effect of, 127 



,, detection of latent, 459 



,, different modes of transformation of, 123-126 



,, supposed explosive effect of, 454 

 Strasburger on action of light on autonomous movements, 690 

 ,, ,, of poison on ascent of sap, 3') 1 



,, ,, on phototaxis, 697 



Suction, automatic record of variation in the rate of, 371 

 „ internal pressure due to, 393, 394, 395 

 ,, mechanical response to, 399 

 Suctional response, effect of cold water on, 373, 376, 379 

 ,, ,, ,, KNO3 solution on, 383 



,, ,, ,, NaCl solution on, 384 



,, ,, ,, poisonous solution on, 386 



,, „ ,, warm water on, 375, 378, 380 



,, ,, excitatory nature of, 382 



,, ,, ,, versus plasmolytic action on, 383 



,, ,, persistence of, when root killed, 381 



Sugar, chemotactic effect of, 699 

 ,, chemotropic effect of, 549 



