CHARTS AND THEIR EXPLANATIONS. 



109 



Charts IyXI (rat 141, female) and LXII (rat 139, male) show recovery 

 of animals maintained on a diet containing casein as the sole protein. The 

 preliminary nutritive condition of the rats is shown to be satisfactory in 

 period 1 on a mixed diet. The ultimate decline on the casein diet during 

 period 2 could not be checked by increasing the content of casein during 

 period 3. This shows that the nutritive failure of the animals was not 

 attributable to the protein per se. Speedy recuperation and maintenance 

 attended the substitution of protein- 

 free milk for the inorganic salt mix- 

 ture contained in food previously used. 

 Note the influence of this dietary 

 change on the appetite of the animals. 

 In period 1 mixed food was used. The 

 composition of food, during the other 

 periods was as shown in table. 



Chart LXIII. 



terminated 



Charts LXIII (rat 60, male) and LXIV (rat 58, female) show 

 maintenance and slight growth of a rat on a diet in which edestin 

 constituted the sole protein for 67 days. The experiment was ter- 

 minated because of the death of another animal, which was found 

 partly eaten, in the same cage. The diet was as shown herewith. 



p. ct. 



Edestin 18.0 



Starch 29.5 



Sugar 15.0 



Agar 5.0 



Salt mixture I. 2.5 



Lard 30 . 



Chart LXV. 



terminated 



Chart LXV (rat 189, female) shows 

 failure of rat to grow or be maintained on 

 a diet containing edestin as the sole pro- 

 tein during 72 days (period 1). There is 

 no loss of capacity to grow, as will be seen 

 by the curve of growth on the milk diet in 

 period 2,32 days. The diet consisted of 



Period I. p. ct. 



Edestin 18.0 



Starch 29 . 5 



Sugar 15.0 



Agar 5.0 



Salt mixture 1 2.5 



Lard 30.0 



Period 2. 



Trumilk 60.0 



Starch 15 . 7 



Salt mixture 1 1.0 



Lard 23. 3 



