STANDARDIZING MILK AND CREAM 223 



desired. At the right hand corners place the differences 

 between the two numbers in line with these corners. 

 The number at the upper right hand corner represents 

 the number of pounds of milk or cream to use with the 

 richness indicated in the upper left hand corner. Like- 

 wise the number at the lower right hand corner repre- 

 sents the number of pounds of milk or cream to use, with 

 the richness indicated in the lower left hand corner. 



Example: How many pounds each of 30% cream 

 and 3.5% milk required to make 25% cream? 



3.5 % 



21.5, tne difference between 3.5 and 25, is the number 

 of pounds of 30% cream needed; and 5, the difference 

 between 25 and 30, is the number of pounds of 3.5% 

 milk needed. 



From the ratio of milk and cream thus found, any 

 definite quantity is easily made up. If, for example, 300 

 pounds of 25% cream is desired, the number of pounds 

 each of 30% cream and 3.5% milk is determined as fol- 

 lows : 



=26.5 



21-5 



21-5 



26.5 



5 

 26.5 



X 300 = 243.4, the number of pounds 



of 30% cream. 



X 300 = 56.6, the number of pounds 



of 3.5% milk. 



