278 



NUMERICAL LAW OF REGRESSION 



The coincidence between the recorded and the theoretical curves is 

 good in the lower points, and less satisfactory at the time correspond- 

 ing to Points 2 and 3, when there was an acceleration of regression. 

 The portion of the curve AB corresponds to the regression, the seg- 

 ment BC to the renewed development of the comb under the influence 

 of the nodule of regeneration. 



12 3 4-567 



Time in weeks 



Fig. 6. 



We have also plotted the weight curve, as in Experiment 2; there 

 is the same independence as previously concerning the evolution of the 

 comb and the general nutrition. 



Comparison of the theoretical and the observed curves shows the 

 coincidence to be as good as possible. Furthermore, if the curve rep- 

 resents the facts as exactly as possible, it must make extrapolation 

 possible; that is, if we know, in a given instance, a portion of the curve 



