174 GILBERT C. BOURNE. 
organic growth. For thousands of instances point to the fact 
that normal growth is effected in a very different way, by 
mitotic division of the nucleus preceding and directing the 
formation of a discrete or concrescent cell-corpuscle. The 
recent researches of cytologists are too many, too good of 
their kind, and too consistent to admit of any other conclusion. 
