ON THE THEORY OF GALVANOTROPISM 449 



( where the secretion occurs) in such experiments. The fact 

 that the disintegration of Actinosphserium and the secretion 

 in Amblystoma both occur at the anode must also be thrown 

 into the balance. 1 



It was an entirely unexpected discovery that ia these ex- 

 periments stimulation always occurs at the anodal side of 

 the central nervous system. This is the only exception to 

 Pfltiger's law which has, to my knowledge, been found in 

 vertebrates thus far. 



i Birukoff has called attention to the fact that cataphoretic effects of the 

 current form the basis of the anodic disintegration of Actinosphserium as well as 

 of the secretion of the glands of Amblystoma. His idea is entirely within the 

 limits of possibility. [1903] 



