180 



Milk and Its Products 



to fill from the outside toward the center. The cen- 

 trifugal force acting more strongly upon those parts 

 of the milk which have the greatest specific gravity, 

 they are thrown to the extreme outside, and the 

 lighter portions, the fat globules, with whatever may 

 adhere to them, are forced to the center. Attached 

 to the extreme outer edge of the bowl are one or 

 more tubes, which, bending inward along the side of 

 the bowl, find an opening near the center. These 

 are the outlets for the skimmed milk. From the 

 extreme center of the bowl, also leading to the out- 

 side, is the cream outlet. When the bowl becomes filled 

 with milk, the centrifugal "I/ pressure will force 

 out through the skimmed milk outlets the milk 



Fig. 22. 



Section of separator bowl of plain 

 or "Hollow Bowl" type. 



