380 



EFFECT OF IRRITATION OF A POLARIZED NERVE. 



Out of tlie ten experiments made in this maniier, iu si.N: ({](), 04, 05, 00. 

 07, and 09) the polarizing current produced an increased excitability, 

 and failed to produce this effect in four experiments. 



In the following experiments, made after the same plan, the muscular 

 contractions following the opening of the irritating current are recorded. 



h. m. 



2 15 

 22 

 24 

 25 

 35 

 36 

 37 

 45 

 47 



3 00 

 03 



10 21 

 45 

 40 

 49 



Number of ex- 

 periment. 



■70. 



1st irritations . 

 2d irritations... 

 3d irritations . . 

 4th irritatious . 

 5th irritatious. . 

 6th irritations. . 

 7tli irritations . 

 8th irritatKms. . 

 9tli ir itations . 

 10th irritiit ons 

 11th in-itations. 

 12th irritations. 



71. 



73. 



1st irritations . 

 2d irritations . 

 3d irritations... 

 4th in-itations. 



Irritation without 

 polarization. 



Irritation, 1 cell, rbeo- 

 cbord : 



2728 cent 1.5 



2728 cent 2. 



2728 cent 0. 



2728 cent 0. 



2675 cent 0. 5 



2675 cent 0.5 



2(^75 cent 0. 5 



2618 cent 0.5 



2G18cent 0. 



2618 cent 0.5 



261 8 cent 0.5 



2618 cent 0. 



Irritation, 1 cell, rheo- 

 chord: 



1526 cent 2.5 



1.526 cent 3. 



1526 cent 0.5 



1.526 cent 3. 



1526 cent 3. 



1.52(1 cent 0.5 



1526 cent 1. 



1526 cent 0.5 



1526 cent 0.5 



1526 cent 0.5 



Irritation, 1 cell, rlieo- 

 choid : 



2675 cent 1.5 



2618 cent 0.5 



2618 cent 0.5 



1S47 cent 1. 



Irritation during 

 polarization. 



Polarization, 1 cell, 

 rheochord: 



10 cent 2. 



ol cent 2. 



57 cent 0.5 



10 cent 0.5 



10 cent 0.5 



10 cent 1. 



58 cent 0.5 



58 cent 1. 



58 cent 0.5 



58 cent 1. 



58 cent 1. 



58 cent 2. 



Polarization, 4 cells, 

 rheochord : 



.57 cent 3. 



57 cent 3. 



57 cent 0. 5 



10 cent 3. 



10 cent 3. 



10 cent 2. 



10 cent 1.5 



57 cent 0.5 



57 cent 0.5 



57 cent 0. 5 



Polarization, 1 cell, 

 rheochord: 



15 cent 3. 



10 cent 1.5 



50 cent 1. 5 



10 cent 1. 



Remarks. 



Rana temporaria. 



Rana temporaria. 



Raaa eseulenta. 



