LIFE AND ELECTRICITY 



15 



to some extent of self-charge. The nucleus and nucleolus 

 are always centrally situated (a fact in itself suggestive of 

 similarly electrified bodies) and the centrosome — (the attrac- 

 tion sphere of physiology) is single. 



Before reproduction can begin the centrosome must be 

 duplicated, thus : — 



The moment that occurs cell-reproduction commences, 

 and the following changes take place with comparative 

 rapidity. 



The two centrosomes, being similarly electrified, at once 

 repel each other and move to positions as far apart as the 

 structure of the cell permits. 



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But inasmuch as the network of protoplasm would not 

 allow of this the nucleus loses its membrane and breaks up 

 into a skein, leaving the centrosomes free to move. They, 

 the latter, are then, in effect, two permanent magnets with 

 their N poles opposed and lines of force connect them as in 

 magnetism. 



Now the nucleus contains a number of threads or rod-like 



