A FEW REMARKS ABOUT FEED STUFFS 115 



value found) as 32 (the contract price per ton) is to (the actual 

 price to be paid per ton). 

 In other words : 



104 : 101.30 = 32 : X 104 X = 3241.60 

 X = 31.17, or the actual price that should be paid per ton. 

 $32 $31.17 = $0.83, the rebate per ton. 



Impossible to Consider Digestibility. It is impossible to con- 

 sider the digestibilities of the nutrients in the several mixed 

 feeds, because of the enormous expenditure of money and work 

 necessary to determine these percentages. Again the primary 

 products that go to make up these feeds are often changing. For 

 example, a mixed feed will be inspected that is made up of corn, 

 rice bran, rice polish, cotton seed meal, and cane molasses. In 

 a month from the above inspection, the same company will change 

 the ingredients of this same brand of feed, so that it consists of 

 corn, wheat bran, alfalfa and cane molasses, and the guarantee 

 and the name of the brand will remain unchanged. Under such 

 conditions it is impossible to consider anything except the chemi- 

 cal analysis. The market prices, demand, ease of obtaining, 

 location, etc. of the available primary products seem to determine 

 the ingredients that are used in mixed feeds. 



No Other Feed Should be Considered in Settlement. Some 

 agents have tried to settle rebates by figuring a mixed feed as 

 valuable as some other feed as oats for example. Oats may be 

 selling for $36 per ton and his feed for $32 per ton, and yet the 

 per cent, of protein, fat and carbohydrates may be about the same 

 in the two feeds. When a feed is sold to contain a given per 

 cent, of protein, fat and carbohydrates for a fixed price, the re- 

 bate should be calculated on this basis and no other feed should 

 be considered in the settlement. 



Values Only Approximate. The j student should understand 

 that the unit values for protein, fat and carbohydrates as given 

 are only approximate, but are used by the trade in certain sec- 

 tions, in settling rebates, and seem to give general satisfaction. 



Overages and Deficiencies. The student may wish to know 

 why allowance is made for overage in certain nutrients and 



