178 



THE FEEDING OF ANIMALS 



down, and fermentation, is that which should be charged 

 to the work of consuniption. As the smaller ration was 

 less than the other by 1,918 grams and the heat produc- 

 tion was 1,086 Calories less for the smaller ration, it 

 appears that the work of consumption was 567 Calories 

 to a kilo of dry matter or 258 Calories to a pound. 



260. Calculation of net energy value. — ^The following is 

 an example of the calculation of net energy value: 



Tabu; XXXVIII 



Calories Calories 



Total chemical energy- 

 Losses of chemical energy 



In feces 2,062 



In urine . . . 243 



In methane 266 



Total 



Increased heat production . 



Total losses . . 



Net energy value 



Calories 

 4,408 



2,571 

 1,202 



3,773 

 635 



261. Net energy of various feeds. — ^In this way the 

 following table was derived from the data secured by 

 Armsby and Fries: 



Tabmj XXXIX 



^Includes alfalfa meal. 



