58 



PROTOPLASM 



quently with non-polarisable brush electrodes also. The same 

 phenomenon could be observed both in drops free from 

 pressure and in those strongly compressed ; and frequently 

 not only streaming but even movement forwards towards the 

 positive pole could be observed most plainly. I can by no 

 means say that the phenomenon will always be produced 

 with absolute certainty ; often the experiments succeed only 

 partially. But in quite a considerable number of cases the 

 phenomenon was so strikingly evident that I consider its 

 existence as proved. At the same < time it was seen that 

 this positive streaming died away immediately or in quite a 

 short time after interruption of the electric current, and that 

 by change of the poles it could be produced again and again 

 and with great certainty, now on one side, now on the other. 



+ 



+ 



Fig. 8. 



The foam-drops best suited to the experiments are such 

 as show no streamings of their own, or only very feeble ones, 

 since lively movements of their own act in all cases as 

 a check to those produced by electricity. Nevertheless, 

 even in vigorously streaming drops, the positive stream, with 

 movement towards the positive pole, was often called forth 

 successfully, and then with change of the poles a corre- 

 sponding stream was caused very regularly, almost without 



