70 



THE ECONOMICS OF FEEDING HORSES 



Eation II. 



Therefore 34 lbs. costs l6-334d., and provides the equivalent of 

 16-9 lbs. of digestible starch ; or, weekly, 328 lbs. costs 9s. Bid., and 

 provides the equivalent of 118-3 lbs. of digestible starch. 



Thus, in this example is illustrated the fact that 

 market price is no guide to nutritive value, for at the 

 same weekly cost the two studs receive rations showing 

 a difference of 10 heat units. Now 1 heat unit is the 

 amount of energy or work supplied by 1 lb. of digestible 

 starch, so that Ration 11. is better than Ration I. by 

 10 lbs. of digestible starch a week, a very considerable 

 item. 



It is necessary, however, to determine the nitrogenous 

 ratios of the two rations before condemning Ration I. 

 offhand, but when this is done it will be found that both 

 dietaries are rich in nitrogenous foods, and both show 



