56 REGENERATION 



nated in the two figures as 1 was nearest the apex, and the serial 

 number denotes the order of the original position of each piece 

 in the stem. The growth of shoots did not commence first in the 

 most apical piece 1, next in the piece marked 2, etc., but growth 

 started practically simultaneously in all pieces; if there was a lag 

 in the time, it was usually in the most apical pieces and for the 

 reason already given. Furthermore, the rate of growth of the 

 shoots did not follow the serial order but was clearly in propor- 

 tion to the mass of the piece of stem, as a glance at the figures 

 shows. Child's assumption is contrary to the facts, not only so 

 far as the regeneration of shoots but also so far as that of roots 

 is concerned. 



