CHARTS AND THUIR EXPLANATIONS. 



Chart CXXIV. Chart CXXV. 



135 



Charts CXXIV (rat 256, female) and CXXV (rat 255, female) show 

 maintenance without growth of medium-sized rats on a diet of protein-free 

 milk and hordein, from barley, as the sole protein. Note the undiminished 

 appetite during course of experiment. Precisely similar mixtures contain- 

 ing other single proteins have sufficed to induce growth. This experiment 

 demonstrates the different nutritive value of hordein and most other pro- 

 teins and its resemblance in this respect to the chemically similar protein 

 gliadin. This is a marked instance of the relation of the chemical consti- 

 tution of the protein to nutrition. The composition of the food was as 

 shown herewith. 



p. ct. 



Hordein 18.0 



Protein-free milk ... . 28.2 



Starch 16.8 to 18 



Agar 5.0 



Lard 300 32 



