INDEX 



A- AND D-REACTIONS, 152 



Acceleration of growth : under subminimal stimulation, 82 ; in subtonic 

 plants under normal stimulation, 85 



Algebraical summation of effects of geotropic and photic stimulation, 

 288, 308 



Allium, growth of : effect of carbon dioxide on, 44 ; direct and after- 

 effect of light on, 76 ; revival of, under stimulation, 84 



Alternating field of electric force : response of Mimosa to, 185 ; accelera- 

 tion of growth under moderate intensity of, 186 ; revival of growth 

 under, 187, 424 ; retardation of growth under strong intensity of, 

 187, 188, 424. See also Wireless stimulation 



Ammonium sulphide, effect of, on growth, 48 



Anaesthetics, effect of, on growth, 43-7, 293, 422 ; on geotropic response, 

 293 ; on autonomous torsion, 393. See also Carbon dioxide, Chloro- 

 form, and Ether, 



Angle of inclination, relation between, and excitation : incident light 

 and phototropic curvature, 113 ; incident geotropic stimulation and 

 excitation, 324, 348, 353, 355, 358 



Angle of inclination, critical, for geotropic excitation, 360, 432 



Anisotropic organs, characteristic response of, 376 



Anisotropic organ, torsional response of, under lateral stimulation : 

 photic, 252 ; radio-thermal, 255 ; geotropic, 307 



Anisotropy, effect of reversal of geotropic, on diurnal movement, 244 



Ascent of sap, effect of variation of rate of : on growth, 52, 54, 55, 58, 

 421 ; on autonomous torsion, 386, 433 



Automatic Torsional Recorder, Mechanical, 385 ; Optical, 383 



Autonomous pulsation : in growth, 18 ; of Mimosa leaf, 269 



Autonomous torsion : rates of different internodes, 380 ; variation of, 

 under changed rate of ascent of sap, 386, 433 ; effect of temperature 

 variation on, 388, 434 ; of formaldehyde on, 392 ; of ether and 

 chloroform on, 393, 434 ; of feeble and strong intensity of electric 

 stimulation on, 395, 397 ; of indirect stimulation on, 399, 403 ; of 

 mechanical stimulation on, 400 ; diurnal variation of, 407 ; effect 

 of unilateral light on, 409, 412 ; combined effect of geotropic and 

 photic stimulation on, 417, 435. 

 Averrhoa Carambola, anomalous response of leaflet to light, 2 ; diffuse 

 stimulation on, 167 ; response to light from above and below, 102, 

 157, 168 



