560 



NERVE. 



and such polarisation as we can recognise, may not appear to be so 

 close as to make the two identical, there is sufficient evidence that 

 the relationship is an extremely intimate one. As knowledge increases, 

 the ties of this relationship appear stronger, and a special interest is 

 thus given to the opinion expressed fifty years ago by du Bois- 

 Eeymond, that electrical excitation is nothing more than a stage in 

 the process of electrolysis. 1 



1 E. du Bois-Reymond, " Untersuclmngen," Bd. ii. S. 387. 



