ILLUSTRATIONS 



FIG. I'AGE 



1. Record of Healthy Adult and Senile Human Pulse (Broadbent) . . 3 



2. Effect of Muscarin in arresting Pulsation of Frog's Ventricle (Cashing) 4 



3. Record of Human Pulse (Broadbent) ...... 4 



4. Demonstration Optical Pulse- Recorder 7 



5. Death of Plant, and Arrest of Pulsation, by Poison .... 8 



6. Death, and Arrest of Pulsation, in Leaflet of Dcsinodiuiii by Strong 



Electric Shock 8 



7. Response of India-rubber 12 



8. Mechanical Lever Recorder 12 



9. Series of Contractile Responses in Muscle 13 



10. Photographic Record of Longitudinal Contractile Response in 



ordinary Stamens {Browtiea ariza) . . . . . . . 13 



11. Differential Lateral Response of Compound Strip .... 13 



12. Plant Chamber and Recorder 16 



13. The Electro-thermic Stimulator 17 



14. Diagram of Connections for Stimulation by Condenser Discharge . 18 



15. Photographic Record of Response and Recovery of Mimosa, taken on 



a slowly moving drum 21 



16. Photographic Record of Response in different specimen, taken on a 



faster-moving drum 21 



17. Response of .5/<?//«y/'«;« to Thermal Stimulation .... 24 



18. Response of -S/ij/Zy/Z/^w to Electric Stimulation . . . . . 24 



19. Effect of Load ... 25 



20. The Spiral Spring- Recorder ........ 26 



21. Isometric Response of J//w(7j-rt; 26 



22. Hydraulic Model for Explanation of Electric Response . . . 31 



23. Electrical Response in Plant by Method of Block .... 32 



24. Electric Response Recorder ........ 33 



25. Method of Transmitted Stimulation 33 



26. Simultaneous Mechanical and Electrical Responses in Biophytniii . . 34 



27. The Abnormal Positive preceding the Normal Negative in Mechanical 



and Electrical Responses in Biophytmn 37 



28. Response of Selenium to the Stimulus of Light 39 



