VARIOUS TYPES OF RESPONSE 



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complete, and the subsequent fatigue is less than after 

 the first response. Therefore the fourth response, though 

 small, is not so small as the second. Thus while the first, 

 third, and odd series of responses are progressively diminish- 

 ing from a maximum, the even series — second, fourth, and 

 so on — are increasing from a minimum. In this way the 

 difference between the successive responses is tending to 

 disappear, a process which is practically complete in the 

 seventh and eighth, after which uniformity is attained. 

 It is very interesting to note that the sum of heights of 

 each pair of responses is approximately the same for succes- 

 sive pairs, and the height of a response in the uniform series 

 is not appreciably different from the mean of the maximum 

 and minimum of the preceding pairs, as will be seen from 

 the following table : — 



Table giving Heights of Successive Responses 



In this adjustment to uniformity we are able to watch 

 a tuning of the organ, as it were, its gradual accommodation 

 to the stimulus impinging upon it. Uniform responses may 



