4 



,.^^. f^ 



^i/r^ 



^^ 



GROWTH AFFECTED BY FEEDING DUCTLESS GLANDS 307 



_l50o 



Chart 1 A graphic comparison of the data of various investigators with those 

 of Hoskins for the growth of normal female albino rats. The weight in grams is 

 plotted against the age in days. D., Donaldson '06, J ., Jackson '13; K., King '15; 

 U., Hoskins' older (low dosage) group of control female rats and i/S Hoskins' 

 younger (high dosage) group of control female rats. The sudden flattening of 

 the graphs W^ and U after 70 and 90 days respectively is due largely to the fact 

 that at these points autopsy of rats was begun. The curves W^ and U are not 

 closely comparable with the others after these two points, because in most cases 

 the largest rats were killed first. 



