368 



EFFECT OF IRRITATION OF A POLARIZED NERVE. 



Under these circumstances, if Pfliiger's theory be true, the constant 

 polarizing current must always cause the irritation to produce a stronger 

 muscular contraction than when it is absent. 



In this, as in following experiments, the effect of the opening of the 

 irritating was not noted, while that of closing alone was observed. During 

 the polarization not only were the movements more marked, but they ex- 

 tended over a greater portion of the limb. It may be here remarked, 

 what was forgotten when speaking of the "methods" of experimenta- 

 tion, that in these exiDcriments the sciatic nerve of frogs was used. 



