484 



Journal of Agricultural Research 



Vol. Ill, No. 6 



in the excreta and the increased heat production consequent upon the 

 consumption of the feed. For example, the alfalfa hay consumed by 

 steer E in experiment 208 contained per kilogram of dry matter 4,408 

 Calories of chemical energy. From the results reported in Tables III 

 and X its net energy value, computed from the average results of periods 

 4, 5, and 6, is as follows: 



Net energy value of alfalfa hay per kilogram of dry matter 



Calories. Calories. Calories. 



Total chemical energy 4, 408 



Losses of chemical energy : 



In feces 2, 062 



In urine 243 



In methane 266 



Total 2, 571 



Increased heat production i, 202 



Total losses 3, 773 



Net energy value 635 



Computed in practically this way, by subtracting from the gross 

 energy the average losses of chemical energy recorded in Table IV and 

 the average energy expenditure consequent upon the consumption of 

 the feeding stuff as given on page 482, the average net energy values of 

 the feeding stuffs used in these experiments are as follows : 



Net energy values of feeding stuffs per kilogram of dry mailer 



Feeding stuff. 



Timothy hay 



Red clover hay .... 



Mixed hay 



Alfalfa hay " 



Maize stover 



Maize meal 



Wheat bran 



Grain mixture No. i 

 Grain mixture No. 2 

 Hominy chop 



Gross 

 energy. 



Calorics. 

 4,518 

 4,462 



4.393 

 4,372 

 4,332 

 4,442 

 4, 532 

 4,685 

 4, 609 

 4, 7°9 



Losses of 

 chemical 



Calories. 

 2, 664 

 2,461 

 2,479 

 2,45.1 

 2,380 



1,115 

 2, 021 

 I, 621 

 I, 620 

 I, 187 



Energy- 

 expended 



in feed 

 consump- 

 tion. 



Calories. 



782 



962 



980 



I, 169 



1,065 



1,434 



1,177 



1,327 



I, 141 



1,365 



Net 

 energy 

 values. 



Calories. 

 1,072 



1,039 



934 

 752 

 887 



1,893 

 1,334 

 1,737 

 1,848 



2,157 



a Includes alfalfa meal. 



Kellner's results when put into the same form are as follows: 



