GROWTH AND CHEMICAL PURITY 269 



(leucin, creatin) and of alcohol, representing the results 

 of protein and carbohydrate digestion. These agents 

 caused an increased output of adrenin and histologic 

 changes in the brain, adrenals and liver, identical 

 with those produced by other kinetic activations, such 



A. B. 



Section of normal cerebellum Section of cerebellum of dog after 



of dog. injection of peptone. 



FIG. 65. EFFECT OF PEPTONE (PROTEIN) ON THE BRAIN-CELLS OF A DOG. 

 Note the presence of disorganized and fatigued cells in B in contrast to 

 the uniform appearance of cells in A. 



(From photomicrographs, X 310.) 



as exertion, emotion, infection ; clinically it is known 

 that an excessive protein diet aggravates cases of Graves' 

 disease, for which a restricted protein diet is routinely 

 prescribed. 



(3) Diminished Kinetic Efficiency: If it is the 



