66 



CREAMERY BUTTER MAKING 



thin sheet between an inner removable cyHnder and the 

 inner wall of the steam jacket, thus heating- it gradually 

 as it passes from one end to the other. In the Twentieth 



Fig. 22.— Reid pa.steurizer. 



Fig. 23.— Bair 

 cream cooler. 



Centur\- heater the steam passes inside a series of discs. 

 These discs are in motion during the heating and force 

 the milk into the separator. Another type of indirect 

 heater is the Reid pasteurizer shown in Fig. 22. This 

 machine not only heats the milk but elevates it, thus dis- 

 pensing with the use of a milk pump. 



