CHARTS AND THEUR EXPLANATIONS. 

 Chart LXXII. 



160 



140 



120 



100 



80 



60 



40 



ii3 



Chart LXXIV. 



Chart LXXIII. 



20 40 60 80 100 120 



Days 



Charts LXXII (rat 217, male), 

 LXXIII (rat 211, male), and LXXIV 

 (rat 212, male) show inadequate growth 

 on a diet of edestin + milk-paste (period 

 1) followed by growth during period 2, 

 in which the food contained protein- 

 free milk and edestin as its sole pro- 

 tein. It should be noted that the ani- 

 mals in growing to several times their 

 original weight must have synthesized 

 their purine- and phosphorus-containing 

 complexes from purine-free food. The 

 influence of size on the food require- 

 ment is shown by the food intake curve. 

 The diet consisted of 



Period I. 



Edestin food (edestin, 18.0; starch, 32.5; 



sugar, 17.0; agar, S.o; salt mixture I, 2.5; 



lard, 25.0) 



Milk food (Trumilk, 60.0; starch; 15.7, 



salt mixture I, 1.0; lard,, 23.3) 



Period 2. 



Edestin 



Protein-free milk. 



Starch 



Agar 



Lard 



p. ct. 



90.0 



10. 



18.0 

 28.2 

 238 



S.o 



250 



20 



40 



60 

 Days 



80 



100 



120 



