FUNCTIONS OF THE NUTRIENTS 



175 



Table XXXV 



257. Difference in total energy use with different 

 rations. — Zuntz and Hagemann determined the oxygen 

 use and carbon dioxid excretion during an exclusive hay 

 diet as compared with a diet of mixed hay and grain. 



Table XXXVI 



The comparison of the energy use for the consump- 

 tion of the exclusive hay ration and hay-and-grain ration 

 phows that the latter, carrying 5,697 grams of digesti- 



