66 



rilE BOOK OF BUTTER 



that two or three machhies can handle the milk of the 

 largest creameries. 



Among some of the most recent developments of the 

 separator are the interchangeable disks, which simplify 

 the assembling of the bowl, the addition of speed in- 

 dicators, better oiling systems, and other improvements 

 that naturally follow in developing a ma- 

 chine. One of the most noticeable recent 

 inventions is the suction feed of the tubular 



Fig. 27. — Tlie original United 



Fig. 2G. — A Siniijlcx power separator. States separator. 



machine. The important feature is that, within certain 

 limits, a change in s])ecd docs not affect the percentage 

 of fat in the cream. The bowl is constructed in such a 

 way that more milk is fed into the bowl when the speed 

 of the machine is liigh than when it is low ; thus the 



