140 



THE RATE OF GROWTH 



[CH. 



day ; or it may have had within the first three days a change of 

 direction, or "point of inflection," and may then have sprung 



2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 



days 



Fig. 35. Curve of regenerative gro\\i;h in tadpoles' tails. (From 

 M. L. Durbin's data.) 



at once from the base-hne at zero. That is to say, there may 

 have been an intervening "latent period," during which no growth 



2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 



days 



Fig. 3H. Mean daily increments, corresponding to Fig. 3.5. 



