Mechanical Conditions Affecting Separation 187 



the passage of the milk from its 

 entrance at the center to the outside, 

 causing it to travel a much greater 

 distance and be subjected to the 

 centrifugal force for a longer time. 

 These contrivances, while adding to 

 the complexity of the machine, have 

 increased the capacity and the effi- 

 ciency of the separation. The best 

 known of these contrivances aVe the 

 so-called "Alpha" discs or 



Pig. 27. United States separator. 



Fig. 26. Parts of United States 

 separator bowl. 



plates, a series of cup- 

 shaped plates, nearly fill- 

 ing the bowl of the 

 separator. These Alpha 

 plates nearly double the 

 separating capacity of 

 the hollow bowl of the 



