214 



RUTH WHEELER 



26 



20 



O 



10 



10 



30 



Days 



50 



Chart 2 Showing the cessation of growth and slow decline of mice on food in 

 which two-thirds of the protein is gelatin and one-third casein. 



Chart 3 Showing the rapid decline of mice on gelatin food and recovery when 

 two-thirds of the gelatin was replaced by casein and merely maintenance when 

 only one-half was replaced. 



preliminary decline was maintained from two to three weeks, 

 followed by a very slow decline (chart 2) . If equal quantities of 

 the two proteins were used, maintenance was attained whether 

 the animals were in normal condition or reduced one-third of 



