STANDARDIZING MILK AND CREAM 127 
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. Ljike- 
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? 
30% 21.5 LBs. 
25% 
35% 5 ces. 
21.5, the 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: 
21.5 +5=— 26.5 
21.5 
ECtee 300 = 243.4, the number of pounds 
of 30% cream. 
x 300 = 56.6, the number of pounds 
5 of arc 96: snille 
