102 



FEEDING EXPERIMENTS WITH ISOLATED EOOD-SUBSTANCES. 



Chart XLIII. 



Chart XLV. 



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40 



60 

 Days 



80 



100 



120 



Charts Xlylll (rat 231, female), 

 XLIV (rat 230, male), and XLV (rat 

 223, male) show the effect of succes- 

 sive additions of increasing quantities 

 of milk powder to the usual casein 

 diet. The smaller quantities of milk 

 are insufficient to induce normal 

 growth. The diet during the several 

 periods was as follows: 



* Casein food: casein, 18.0; starch, 32.5; 

 sugar 17.0; agar, 5.0; salt mixture I, 2.5; lard, 25. 



fMilk food: Trumilk, 60.0; starch, 15.7; 

 salt mixture I, 1.0; lard, 23.3. 



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60 

 Days 



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120 



