570 



IOWA DEPARTMENT OF AGRICULTURE. 



of payment it is necessary to assume some constant figure as representing 

 an average test of separator skim milk and credit all cream patrons with 

 this uniform loss. A fair figure seems to be three per cent which is assum- 

 ing that the skim milk tests 0.12 per cent and the whole milk 4 per cent 

 fat. This 0.12 is three per cent of the 4.0 pounds of fat. All that is nec- 

 essary now is to add three per cent to the weight of the fat brought to the 

 factory by each cream patron for a given period and the sum will be very 

 nearly the fat in such patron's whole milk. An illustration may help to 

 make these calculations clearer: 



Suppose 125 pounds of butter are sold by a factory for thirty dollars, 

 And that the factory receives four cents per pound for making the butter, 

 which will amount to five dollars; this leaves twenty-five dollars to be paid 

 to the patrons A. B. C, who supplied the following weights of milk and 

 cream: 



In order to pay the cream patron for his milk fat, his weight of butter 

 fat should be increased by three per cent, and patron C who delivered 16.3 

 pounds butter fat as cream, should accordingly have this 16.3 multiplied 

 by 1.03, which is equal to 16.8 pounds. 



The weights of fat from each patron's share of the receipts are calcu- 

 lated will be: A 40 pounds, B 43.2 pounds, C 16.8 pounds, or a total of 100 

 pounds fat, for which twenty-five dollars was received. From this we find 

 that one pound of fat is worthy twenty-five cents. 



The amount due each patron is then found by multiplying his weight 

 of fat by this price per pound : 



A 40 lbs. at 25 cents $10.00 



B 43.2 lbs at 25 cents 10.80 



C 16.8 lbs. at 25 cents 4.20 $25.00 



In calculating the dividends of cream patrons when both milk and 

 cream patrons come to one factory, the weight of butter fat (found by test- 

 ing the cream) is, therefore, multiplied by 1.03 and this result is taken as 

 the total amount of fat that would have been delivered by the cream patron 

 if he had sent his milk to the factory. 



Me. Munsey : Supposing a farmer gets the idea into his head 

 to know absolutely whether he is getting a correct test of his cream. 

 He purchases a hand separator and takes it to his farm. And 

 by the end of the month has found out that we are giving him 4 

 per cent more than belongs to him. We hear it in an indirect 

 way. His neighbor gets suspicious. It looks as though our test 



