THE COMPARATIVE COST OF VARIOUS FOODS 69 



selecting that food which contains the necessary heat 

 units at the lowest price, and so an addition of maize 

 would answer every requirement, and that at a cheaper 

 rate than if the same weight of beans were added. 



We can, of course, apply the same method in testing 

 the comparative cost of complete rations. The two 

 rations given below are fed to two large studs of horses 

 in London, and they are selected for the reason that 

 at the prices given in the tables the weekly cost is 

 practically the same in each case. The question to be 

 determined is as to which stud is getting the better 

 value for the money spent. 



Ration I. 



Therefore 32f lbs. costs 16'285d., and provides the equivalent of 

 15-46 lbs. of digestible starch ; or, weekly, 328 lbs. costs 9s. 6d., and 

 provides the equivalent of 108-2 lbs. of digestible starch. 



* The market prices taken in this and the following example 

 were current a year or two ago. They are very different from 

 to-day's prices, but this in no way affects the value of the examples 

 as illustrations of the argument in the text. 



