Fig. 32.—Increased Response with Increasing Vibrational Stimuli (Cauliflower-stalk)
Stimuli applied at intervals of three minutes. Vertical line = ·1 volt.
(B) 1. The vibrational stimulus was increased from 2·5° to 5° to 7·5° to 10° to 12·5° in amplitude. It will be observed how the intensity of response tends to approach a limit ([fig. 32]).
Table showing the Increased E.M. Variation
produced by Increasing Stimulus
| Angle of Vibration | E.M.F |
|---|---|
| 2·5° | ·044 volt |
| 5° | ·075 volt |
| 7·5° | ·090 volt |
| 10° | ·100 volt |
| 12·5° | ·106 volt |
2. The next figure shows how little variation is produced with low value of stimulus, but with increasing stimulus the response undergoes a rapid increase, after which it tends to approach a limit ([fig. 33], a).
