538 NUTRITION OF FARM ANIMALS 



TABLE 151. EFFECT OF WORK ON PROTEIN KATABOLISM OF A DOG 



TABLE 152. EFFECT OF WORK ON PROTEIN KATABOLISM OF A MAN 



In the case of the man, while there was a great increase in the 

 amount of carbon dioxid and water excreted, there was practically 

 no increase in the excretory nitrogen. With the dog fasting or on a 

 meat diet only, there was in every case a small increase which Voit 

 attributes to a deficiency of non-nitrogenous nutrients and not to the 

 direct effect of muscular exertion. 



637. Influence of non-nitrogenous nutrients. While Voit's 

 results seem quite in harmony with present conceptions of the 

 animal organism as essentially a converter of energy, they 

 aroused considerable criticism at the time and led to an extended 

 controversy as to the source of muscular energy. The effect 



