ETHOD OF DETECTING NERVE RESPONSE 6

3. DIAGRAM SHOWING INJURED END OF NERVE CORRESPONDS TO 8
COPPER IN A VOLTAIC ELEMENT

4. ELECTRIC RECORDER 11

5. SIMULTANEOUS RECORD OF MECHANICAL AND ELECTRICAL 13
RESPONSES

6. NEGATIVE VARIATION IN PLANTS 19

7. PHOTOGRAPHIC RECORD OF NEGATIVE VARIATION IN PLANTS 20

8. RESPONSE RECORDER 21

9. THE COMPENSATOR 22

10. THE SPRING-TAPPER 23

11. THE TORSIONAL VIBRATOR 24

12. RESPONSE IN PLANT TO MECHANICAL TAP OR VIBRATION 25

13. INFLUENCE OF SUDDENNESS ON THE EFFICIENCY OF 26
STIMULUS

14. THE METHOD OF BLOCK 28

15. RESPONSE IN PLANT COMPLETELY IMMERSED UNDER WATER 29

16. UNIFORM RESPONSES IN PLANT 36

17. FUSION OF EFFECT UNDER RAPIDLY SUCCEEDING STIMULI IN 36
MUSCLE AND IN PLANT

18. ADDITIVE EFFECT OF SINGLY INEFFECTIVE STIMULI ON 37
PLANT

19. 'STAIRCASE EFFECT' IN PLANT 37

20. APPEARANCE OF FATIGUE IN PLANT UNDER SHORTENED 39
PERIOD OF REST

21. FATIGUE IN CELERY 40

22. FATIGUE IN CAULIFLOWER-STALK 41

23. FATIGUE FROM PREVIOUS OVERSTRAIN 41

24. FATIGUE UNDER CONTINUOUS STIMULATION IN CELERY 42

25. EFFECT OF REST IN REMOVAL OF FATIGUE IN PLANT 43

26. DIPHASIC VARIATION IN PLANT 46

27, 28. ABNORMAL POSITIVE RESPONSES IN STALE PLANT 48, 49
TRANSFORMED INTO NORMAL NEGATIVE UNDER STRONG
STIMULATION

29. RADIAL E.M. VARIATION 50

30. CURVES SHOWING THE RELATION BETWEEN INTENSITY OF 52
STIMULUS AND RESPONSE IN MUSCLE AND NERVE

31. INCREASING RESPONSES TO INCREASING STIMULI (TAPS) IN 52
PLANTS

32. INCREASING RESPONSES TO INCREASING VIBRATIONAL 53