EFFECT OF lERITATION OF A POLARIZED NERVE. 



391 



Out of the preceding forty -five experiments twenty usually gave a de- 

 creased excitability of the nerve to the side of the anode of the constant 

 current. In three experiments (89, 107, and 124) no effect was pro- 

 duced by the polarization. In one experiment (115) in the beginning aa 

 increased excitability was produced to the copper side of the constant 

 current, and in another the result was inconstant. In twenty experi- 

 ments, however, the irritating current usually or always produced an 

 increased excitability of the nerve in the anelectrotonus portion of the 

 nerve; i. e., an efiect directly opposite to that demanded by Pfliiger's 

 theory. 



In the following experiments the opening instead of the closing of the 

 irritating current is recorded : 



