62 



DAIRYING. 



31. What are the constant and the variable factors in calculating 

 the cost of milk produced by different cows? 



32. How much milk at 3c per quart and butter at 30c per pound 

 must a cow produce to pay the expenses of keeping her per 

 year? 



33. How may a calculation be made to demonstrate that one cow 

 giving 2,000 pounds more milk than another cow is worth $200 

 more to her owner? 



34. What are some of the important factors that influence the cost 

 of producing milk in different localities ? 



35. What do you estimate the cost of keeping a cow in your herd to 

 be for one year and what is the cost per pound of the total 

 milk produced by the herd? 



36. Give a complete list of the supplies needed for testing the milk 

 of cows at the farm and an estimated cost of the same. 



37. How often should the milk of a cow be weighed and tested in 

 order to calculate her total production? 



38. What is the objection to weighing and testing one milking only? 



39. Briefly describe a way of testing the milk of a cow for one year. 



40. How much milk and butter fat was produced by a cow in one 

 year where the following record was made and what was the 

 value of the butter fat in her milk at the prices given ? What is 

 the value of the skim milk when corn is worth 60c per bushel ? 



The cow began milking October 1, 1910. 



