410 EFFECT OF IRRITATION OF A POLARIZED NERVE. 



EXPEPwIME2fT 193. 



As a general rule, in this experiment an increased excitability of the 

 nerve was produced of an ascending- polarizing current of the anode to 

 the side. 



EXPERIMENT 194. 



An ascending ])olarizing current decreased the excitability of the 

 nerve wli en l)<)t]i currents were of the same strength (1 JJaniel). A de- 

 scending polaiizing current failed to influence the height of tlie contrac- 

 tions when the irritating current was derived from 1 and the ])<)hirizing 

 current from li Daniels, but an ascending [lolarizing current under tliese 

 circumstances again diminished the excitability of the nerve. With 

 each of the currents derived from 1 Daniel, the descending polarization 

 failed to influence the height of the contractions. 



