92 



LORANDE LOSS WOODRUFF. 



rate at one part of the life cycle and a general acceleration of the 

 rate at another part. 



During period 45, however, the rate of division of culture P 



c 8 



l_l 0) 







-O s -^ 



Q - 



II ^3 



Cu "o -^ 







> :5 5 rt 



X 



fell below that of the control (I) and has remained so up to the 

 present period when it increased to the same rate as that of the 

 control (Fig. 2, periods 45 through 54). It was suspected, how- 



