104 PROFITABLE DAIRYING 



the odors absorbed from certain feeds. Although 

 much may be said in favor of this practice, 

 great care must be exercised in aerating milk. 

 If a farmer is in doubt whether to aerate his 

 milk or to cool it, cooling is advised for the 

 reason that simply aerating milk will not reduce 

 its temperature sufficiently. Aerating must be 

 done in a very cleanly, sweet-smelling place, 

 otherwise, during this process, the milk will 

 absorb undesirable odors. In case the milk is 

 not separated it should be cooled down at once, 

 and this can only be done by placing the cans 

 in cold water and stirring the milk frequently 

 until cold. It is not advisable, of course, to 

 cover the cans tightly, because milk will have a 

 better flavor if some of its natural odors are 

 allowed to escape. It is poor practice to pour 

 warm and cold milk together for the purpose 

 of cooling the warm milk. This should never 

 be done. In case a hand separator is used it is 

 not necessary to cool at once, because the sep- 

 arator will do better work when the milk is at 

 the temperature it has when drawn from the cow. 

 The farm separator. The farm separator is 

 becoming very popular. The advantages in using 

 one of these machines, such as the increased 

 value of the fresh skim-milk and the amount of 

 labor saved in hauling to the factory, are well 

 known. However, many farmers neglect to take 



