;66 RESEARCHES ON IRRITABILITY OF PLANTS 



Automatic Pulsation of Desmodium 



PAGE 



141. Uniform pulsations of Desmodium .... 294 



142. Determination of rate of movement at different phases 297 



143. Determination of significance of up-and-down movement 295 



144. Effect of internal hydrostatic pressure . . . 300 



145. Effect of load ........ 301 



146 



H7 

 148 



*49 

 150 

 151 

 152 

 153 

 154 

 155 



Condition - of Standstill and Revival of Pulsation 



Gradual diminution of amplitude under isolation . . 313 



Stoppage of pulsation brought on by depletion of energy 314 

 Single response to moderate induction shock, in leaflet at 



standstill 30S 



Multiple excitation under tetanisation .... 308 



Single response to stimulus of light of brief duration . 316 



Restoration of pulsation under continued action of light 307 



Arrest of pulsation by ligature ..... 303 



Arrest of pulsation by the action of a cut . . . 304 



Determination of apex time ..... 309 



Refractory period of Desmodium ..... 310 



Effect of Electric Stimulation on Automatic Pulsation of 

 Desmodium 



156. Incapability of tetanus . . . . . .318 



157. Extra pulsation induced by application of electric stimu- 



lation during diastole . . . . . 319 



158. Inhibitory effect of transmitted excitation on rhythmic 



pulsation ........ 320 



159. Augmentation of pulsation induced by transmitted 



excitation ........ 321 



Influence of Temperature on Rhythmic Pulsation of 



Desmodium 



160. Effect of lowering of temperature .... 325 



161. Effect of rapid cooling ...... 326 



162. Arrest of pulsation at low temperature . . . 326 



163. Effect of rise of temperature on amplitude and period . 327 



164. Effect of continuous rise of temperature . . • 329 



165. Effect of continuous rise and return to original tem- 



perature ........ 330 



166. Effect of variation of temperature on systolic and diastolic 



limits 33° 



167. Arrest of pulsation at high temperature . . . 331 



