248 
Proceedings of Royal Society of Edinburgh. [sess- 
Experiment 13. 
Polarising Current. 
Intrapolar 
Stimulation 
Effect. 
1 D Rh. 50 l 
+ 22 
Same strength of stimulus. 
1 D Rh. 2000 l 
+ 41 
2D 4, 
+ 28 
3 D 4 
+ 17 
4D| 
+ 24 
5D| 
0 
1 D Rh. 2000 
+ 36 
Experiment 14. 
Polarising Current. 
Cathodic 
Extrapolar Effect. 
1 D t 
-27 
2 D f 
-29 
3Dt 
-31 
5 D t 
-43 ? 
10 D t 
-44 
I do not propose to discuss here, further than I have done, the 
real significance of the results stated, as I hope soon to have an 
opportunity of doing so in connection with a more extended 
research, embracing the effect of stimulation on the whole of the 
polarisation phenomena of nerve and muscle. I should just like 
to say, that it is by no means impossible that a real positive 
electrotonic variation may be mixed up with a true action current 
in the positive direction. 
The work was done partly in the Owens College, and partly at 
Edinburgh in the Laboratory of Professor Kutherford, whose great 
kindness I take this opportunity of acknowledging. 
