EDUARD TJHLENHUTH 



357 



Mm 

 250 



230 

 210 

 190 

 170 

 150 

 130 



110 



90 



70 



50 



30 



' 10 



5 15 25 35 45 55 65 75 85 



Weeks 



Fig. 5. Experiment 4 {Ambystoma tigrinum, 1919, Series A and XXXVII). 

 The unbroken line represents the growth of the controls, the dotted line that of 

 the anterior lobe-fed animals. 



