ILLUSTRATIONS 



FIGl 

 I. 

 2. 



3- 

 4- 

 5- 

 6. 



7- 

 8. 



9- 

 io. 

 ii. 



12. 



13- 



14. 



15- 



16. 



17- 



19. 

 20, 

 22, 



26. 



27. 

 29 



30 



31 



32 

 33 

 34 

 35 

 36 

 37 



Diagrammatic representation of Response Recorder 



Response curve of leaf of Mimosa 



Resonant Recorder, upper part .... 



General view of the Resonant Recorder and accessories 

 Record showing advantage of intermittent contact 

 Electro-thermic stimulator ..... 



Response of Mimosa to indirect thermal stimulation 



Response to stimulus of constant electric current . 



Direct stimulation by condenser discharge 



Record of response to stimulation by condenser discharge 



Arrangement for applying single make- or break-shock 



Records giving apex time of response of Mimosa 



The dot marker ...... 



Response of Mimosa giving time-relations 

 Record of response of leaflet of Biophytum . 

 Response of leaf of Neptunia 

 Erectile response of leaf of Mimosa, due to local stimulation 

 upper half of pulvinus .... 



Responses of leaf of Desmodium gyrans 



The electric signal ..... 



21. Records showing greater efficiency of break-shock 



23, 24, 25. Additive effects of stimulus 

 Effect of load on response of Mimosa . 



28. Effect of temperature on response of Mimosa 

 Increasing response under increasing stimulation 

 Periodic starter, and automatic exciter 

 Electrolytic contact-maker .... 



Photograph of duplex type of Resonant Recorder 

 Uniform responses of Mimosa 

 Fatigue under shortened period of rest 

 Growing fatigue ...... 



Periodic fatigue ...... 



Staircase response in frog's muscle 



xix 



PAGF 



6 



7 

 17 

 20 

 21 



25 

 26 



27 

 28 



30 

 32 

 38 

 40 



4i 

 43 

 43 



45 

 46 

 52 

 53 

 54-56 



57 

 60, 61 

 62 



66 

 68 

 69 

 72 

 73 

 74 

 74 

 77 



of 



