114 ELEMENTARY TREATISE ON STOCK FEEDS AND FEEDING 



hydrates, and one pound of fat is considered to be worth as much 

 as two and a quarter pounds of carbohydrates. Therefore, to 

 secure the total number of units on which the value is based, 

 we multiply the protein content by 2.50 and the fat content by 

 2.25 and add these products to the carbohydrate content. 



Example. Let us suppose a commercial feed is sold for $32 

 per ton and guaranteed to contain 14 per cent, of protein, 4 per 

 cent, of fat and 60 per cent, of carbohydrates. By analysis we find 

 12.30 per cent, of protein, 3.80 per cent, of fat and 62 per cent, 

 of carbohydrates. Then the percentages of protein, fat and 

 carbohydrates as guaranteed, multiplied by their respective unit 

 values will give the unit values guaranteed of each of these 

 nutrients. The addition of these will give us the total unit value 

 guaranteed. In other words, 14 (the per cent, of protein guar- 

 anteed) multiplied by 2.50 (the unit value for protein) gives us 

 35.00 (or the unit value of protein guaranteed). 



4 (the per cent, of fat guaranteed) multiplied by 2.25 (the unit 

 value of fat) gives us 9.00 (or the unit value of fat guaranteed). 



60 (the per cent, of carbohydrates guaranteed) multiplied by 

 i.oo (the unit value of carbohydrates) gives us 60.00 (or the 

 unit value of carbohydrates guaranteed). 



That is : 



14 X 2.50 = 35.00 



4 X 2.25 === 9.00 



60 X i -o = 60.00 



Total unit value guaranteed 104.00 



In a similar manner we arrive at the total units found. 

 Example : 



12.30 x 2.50 == 30.75 



3.80X2.25= 8.55 



62.00 X LOO = 62.00 



Total unit value found = 101 .30 



That is, the purchaser was guaranteed 104 units for $32 a ton, 

 but he received only 101.30 units. 



Then 104 (the unit value guaranteed) is to 101.30 (the unit 



