20 



THE PHYSICAL BASIS OF LIFE 



ground would be given for the conclusion that the chon- 

 driosomes may multiply by division, since the plastids un- 

 doubtedly have this power. Still less is known of the 

 Golgi-bodies in this regard; but recent studies have 

 clearly shown that these bodies, too, group themselves in 

 a definite maimer about the mitotic spindle during cell- 



FIG. 9 



Continuation of Fig. 8. Division of the ehondriosonie-ring into four parts, of wliicli 

 two pass to each daughter-cell (A-D), followed by the division of each of these 

 in the ensuing cell-division (E, F). 



division, and separate into two resulting daughter-groups 

 (Fig. 11). 



Doubtful or disputed points aside, it already seems 

 clear, that in a large class of cases the specific substances 

 of which the chondriosomes and Golgi-bodies are respec- 

 tively composed are not formed de novo in the daughter- 

 cells, but are somehow directly derived from correspond- 

 ing components of the mother-cell. Recent researches 



