290 PROF. J. C. BOSE ON ELECTRIC RESPONSE IN 
will be noticed that owing to imperfect molecular recovery 
during the time allowed, the succeeding heights of the responses 
have undergone a continuous diminution. 
From considerations given above, we see how a period of 
rest is effective in the removal of all traces of fatigue. 
Increased Response with increasing Stimulus. 
I will now proceed to show that the electric variation 
produced is not merely a qualitative phenomenon, but the 
increased intensity of stimulus always gives rise to a definitely 
increasing response. 
In order to obtain the simplest type of effects, not complicated 
by secondary phenomena, one has to choose specimens which 
exhibit little fatigue. Having obtained such a specimen I took 
records of responses for increasing stimuli caused by increasing 
amplitudes of vibration. In the record given (fig. 18) the 
Fig. 13. 
Increasing responses to increasing vibrational stimuli; the vertical line 
to the right represents ‘1 volt. 
amplitude of vibration was increased from 2°°5 to 12°°5 by steps 
of 2°5 (cauliflower-stalk). It will be noticed the remarkably 
definite manner in which the response increases with the stimulus. 
The rise is at first rapid, but with high intensities of stimulus 
there is a tendency for the response to approach a limit. 
