EFFECT OF IRRITATION OF A POLARIZED NERVE. 



395 



applied to the nerve ; of the remaining experiments, in fourteen the op- 

 posite result was obtained, though the manner of experimenting was 

 the same as adopted in the other experiments. 



In the following experiments the nerves were irritated in their normal 

 position, without having previously been injured. As in similar experi- 

 ments, before described, made with the descending polarizing current, 

 the non-polarizable electrodes had to be substituted by copper electrodes. 

 These were covered with wax, except at the point where they touched 

 the nerve. With this exception the apparatus was unchanged. In this 

 series of experiments the irritation was made by the closing of a gal- 

 vanic circuit. 



