274 MODERN BUTTER MAKING. 



56. To find butter fat losses in skim milk. 



Problem: How much butter fat is lost in 25,000 

 lbs. of skim milk testing .09 per cent? 



Rule: Multiply the skim milk pounds by its test, 

 divide the result by 100 and point off as per rules 

 5 and 9. 



Solution: 25,000 X -09=2,250; 2,250-f-100=:22.5 

 lbs. Ans. 



Explanation: Every 100 lbs. of skim milk con- 

 tains .0009 or 9/10,000 or .09 per cent butter fat. If 

 every 100 lbs. skim milk contains .09 per cent but- 

 ter fat, then 25,000. lbs. will contain 25,000 X -09% 

 or 2,250.00. Dividing this by 100 gives the result, 

 22.50 lbs. 



Problems for Practice. 



How many pounds of butter fat are lost in : 



1. 7,.500. lbs. of skim milk testing .06%? 



Ans. 4.5 lbs. 



2. 10,500. lbs. of skim milk testing .09%? 



Ans. 9.45 lbs. 



3. 25,780. lbs. of skim milk testing .15% 1 



Ans. 38.67 lbs. 



4. 30,000. lbs. of skim milk testing .03%? 



Ans. 9. lbs. 



5. 30,000. lbs. of skim milk testing .09%? 



Ans. 27. lbs. 



6. 30,000. lbs. of skim milk testing .1 % ? 



Ans. 30. lbs. 



7. 30,000. lbs. of skim milk testing .2 % ? 



Ans. 60. lbs. 



8. 30,000. lbs. of skim milk testing .3 % ? 



Ans. 90. lbs. 



NOTE. — Losses of butter fat in buttermilk are determined tlie same 

 way as losses of butter fat in skim milk and come under the same rule. 



