Heat 



Value 

 of Food 



Calories. 

 20,000 



15,000 



Starch 

 Equiva- 

 lent. 



iLb; 



Live weight, 



lb. 9O0 looo iioo 1200 1300 1400 1500 1600 1700 1800 



Fig. 23.— Diagram showing ths Energy required from the Food 

 BY Oxen of Different Weights. 



[Face page 198. 



