THE PRODUCTION VALUES OF FEEDING STUFFS 639 



TABLE 185. EXCRETED BY SWINE PER 100 GRAMS DIGESTED 

 CARBOHYDRATES 



Although there is considerable range in the results of in- 

 dividual experiments, and while those on non-ruminants are 

 few in number, nevertheless, the foregoing figures afford a basis 

 for an approximate estimate of the losses of chemical energy 

 in the combustible gases. Summarizing the available data 

 and computing the equivalent quantities of energy, it appears 

 that the following average deductions may be made from the 

 gross energy of the feed for the fermentation losses. 



TABLE 186. FACTORS FOR COMPUTING FERMENTATION LOSSES 



Metabolizable energy 



746. Definition. The difference between the chemical 

 energy of the feed and that lost in the excreta shows how much 

 of the former is capable of being converted into other forms in 

 the body, either during the changes which the feed undergoes in 



