58 ANIMAL ELECTRICITY. LECTURE III. 



of the chalk line, indicating the state of things during 

 the proposed five minutes' tetanus, was dictated by the 

 thought that with the imagined progressive evolution of 

 CO3 there should be a gradually increasing negative 

 variation, giving a gradually increasing departure from 

 the general base line. Such was the forecast — yet, 



Fig. 20. — Hypothesis. 



when half an hour later, I watched the lines of plate 

 ^75 (fig- 21) appearing in the developing dish, it was 

 with something of astonishment that I found the greater 

 regularity of the series to be the sole difference 

 between the autographic record of the nerve itself, 

 and my rough blackboard drawing. 



Well, this is not proof, but it is very remarkable 

 evidence. And considering that we have no previous 



