144 GERMINATION 



cell formation appears, in other cases, to be combined with 

 this peculiar nuclear division. It is as yet impossible, unfor- 

 tunately, to follow this nuclear fragmentation directly in 

 living tissue under the microscope ; but it may be 

 stated in favour of the above explanation of nuclear 

 fragmentation that it mainly occurs in the cells of actively 

 growing tissue . . . and in rapidly growing tumours." 



May we not take it, in view of what we have seen of the 

 effect of over-stimulation upon vegetable cells, that " actively 

 growing tissue " and " rapidly growing tumours " suggest 

 over-ionisation ? 



" There is, lastly, a particular form of cell division to be 

 described which greatly differs from the foregoing varieties, 

 in that one portion of the divided cell is completely devoid 

 of any part of the nucleus. This discovery was first made 

 by Lavdowsky. I am in a position to confirm this, on the 

 strength of experiments made before Lavdowsky 's communi- 

 cations. I placed under the microscope some white blood 

 corpuscles from a frog, in aqueous humour taken from 

 the same animal, warmed them to 20-32°c., and stimulated 

 repeatedly with the induced electric current. By this means 

 I observed, in different experiments, the process of division." 

 . . . There was " separation of a portion of the cell 

 protoplasm from cells which went through active amoeboid 

 movements on the cover glass. Lavdowsky calls this * cell 

 division hy force/ and suggests that the two portions of the 

 cell move in different directions by means of their amoeboid 

 power and thus tear the protoplasm apart." 



In Studies in Electro-Physiology I advanced the opinion 

 that amoeboid movement arises from electrical attraction 

 and repulsion in accordance with the experiments of Ampere. 



" This is a plausible description of the process ; but it 

 seemed to me that the process was rather a disintegration of 

 the cell.'* The italics are mine. 



I will now quote from the source previously mentioned, an 

 account of an experiment made by Dr. Carrel with a small 

 piece of cancer tissue : 



" The experimenter was now able to watch this 

 phenomenon taking place under his very eyes. The new 



