DAIRYING 



219 



Arithmetic: 



1. A cow gives an average of 20 lbs. of milk per day for 300 

 days each year. What is her yearly milk production? 



2. A cow gives 6,000 lbs. of milk in a year, testing 4% fat. How 

 many pounds of butter-fat does she give? How much is the butter-fat 

 worth at 30c. per pound? 



3. A cow gives 6,000 lbs. of milk in a year, testing 5% fat. How 

 many pounds of butter-fat does she give? How much is the butter- 

 fat worth at 30c. per pound? 



t'igure 94a. — Outfit for making the Babcock test. ' From left to right, an eight 

 bottle tester; a graduate for measuring acid; a teat bottle; compasses for measur- 

 ing fat in neck of bottle; a pipette for measuring milk, and a sample bottle. 



Exercises: 



1. Weigh the milk separately of two or more cows for a month. 

 Test it at home or at school or have it tested at the creamery. Record 

 how much milk each cow gives and the per cent of butter-fat. Compare 

 the records of different cows. 



2. Keep a record of the feed given to one or more dairy cows 

 for a month. What is it worth at current prices? What else did the 

 cow or cows cost? Compare costs with value of milk and products 

 obtained. 



3. Observe how careful or negligent farmers may be in handling 

 milk. 



