DAIRYING 63 



The special point of advantage claimed for this vat is the 

 opportunity it gives the butter maker to maintain a uniform 

 temperature after the cream has been brought to such a tempera- 

 ture as he wishes to hold it. The insulation of the walls with 

 several thicknesses of suitable material is supposed to protect the 

 cream from changes in temperature of the outside air. 



512. The Farrington Cream Ripener. The Farrington ripener 

 consists of two horizontal cylinders revolving on a common center, 

 the inner one of tin and the outer of wood with a space between. 



Plate 17 The Wizard Agitate r 



Through this space either hot or cold water or brine may be forced 

 for the purpose of changing the temperature of the cream which is 

 in the inner cylinder. The ripener is revolved by means of a belt 

 attached to a pulley. This revolving motion keeps the cream 

 thoroughly mixed and brings it into contract with the tin sides of 

 the cylinder, thus giving the butter maker a ready control of the 

 temperature. This control of the temperature is most important. 

 Every butter maker knows that no one temperature should be 

 maintained during the entire time of ripening, but that a change is 



