650 



NUTRITION OF FARM ANIMALS 



Feeding stuffs, rich in protein and fat, especially the latter, 

 naturally give higher values, as is illustrated by the following 

 results, likewise taken from Table 188. 



TABLE 193. METABOLIZABLE ENERGY PER KILOGRAM DIGESTIBLE 



ORGANIC MATTER 

 Palmnut meal 



Cattle 4-85 Therms 



Sheep 3.98 Therms 



Wheat gluten 



Cattle 4.79 Therms 



Flesh meal 



Swine 5.63 Therms 



Taking the pound as the unit for reasons of practical con- 

 venience, it is believed that for the approximate computation 

 of the metabolizable energy of ordinary feeding stuffs or ra- 

 tions whose content of digestible organic matter is known or 

 can be estimated, the following factors may be used, at least for 

 ruminants, without serious error : 



TABLE 194. METABOLIZABLE ENERGY PER POUND DIGESTIBLE OR- 

 GANIC MATTER 



Losses of energy in heat production 



It was stated in a previous paragraph (741) that the gross 

 energy of a feeding stuff is subject to two classes of losses, viz., 

 losses of untransformed chemical energy in the excreta and 

 losses through conversion into heat. The losses of chemical 

 energy have been discussed in the preceding paragraphs. The 

 second class of losses has now to be considered. 



