ARITHMETIC OF MILK AND MILK PRODUCTS I93 



11. FINDING YIELD OF CHEESE FROM FAT AND 

 LACTOMETER 



j^nlc^ — To find how much green cheese can be made 

 from 100 pounds of milk when the per cent, of fat in 

 milk and the lactometer reading are known, find the 

 per cent, of solids-not-fat by Rule 4, divide the re- 

 sult by 3 and to this add the per cent, of fat multiplied 

 bv .91, and finally multiply the result by 1.58. - 



This rule was devised by Dr. Babcock and gives 

 good results. It may be expressed also in the follow- 

 ing form: C^oiMB-not-fat ^ f^t x .91) X 1.58. 



EXAMPLES FOR PRACTICE UNDER RULES 

 8 TO 11 



(i) What is the per cent, of casein in milk contain- 

 ing (a) 3.50, (b) 3.60, (c) 4, (d) 44 per cent, of fat? 



(2) How much green cheese should be made from 

 100 pounds of the different milks mentioned in the 

 preceding example? (Apply Rule 9 and Rule 10). 



(3) How much green cheese should be made from 

 18,000 pounds of milk testing 3.75 per cent, of fat? 



(4) How much green cheese should be made from 

 100 pounds of milk testing 4 per cent, of fat and show- 

 ing a lactometer reading of 33? 



(5) What is the per cent, of casein and albumin in 

 milk containing (a) 3.50, (b) 3.80, (c) 4.30, (d) 5 

 per cent, of fat? 



12. FINDING DIVIDENDS ON fXt BASIS AT 

 CREAMERIES 



j^nlc— To calculate the amount of each patron's 

 dividend at creameries on the basis of the fat in the 

 milk, multiply the amount of the milk-fat delivered by 

 each patron by the price of one pound of fat. 



