ON BUTTERMAKING 13 



2. Intermittent hollow bowl. 



3. Continuous hollow bowl. 



4. Continuous separator, with contrivances 

 within the bowl. 



What is the principal part in separator construc- 

 tion? 



A hollow bowl with or without inner devices and 

 rotating at high speed in a vertical position. 



Into what three layers does milk divide in a revolv- 

 ing separator bowl? 



1. Separator slime on the outside. 



2. Skim milk next the slime. 



3. Cream nearest the center of the bowl. The 

 richest cream is in the very center of the bowl. 



What is the composition of separator slime? 



It is made up of casein, insoluble dirt, bacteria, 

 fat, water, ash, albumin, and foreign bodies. 

 Fleischmann gives the following: 



Water 67.3% 



Fat 1.1% 



Caseous matter. 25,9% 

 Other substances 2.1% 

 Ash 3.6% 



100.0% 



What is the cream screw? 



It is the outlet by which the cream leaves the 

 separator bowl. 



