FROM THE PRACTICAL VIEWPOINT 



ELECTRICAL CONJROLER 



SECTION OF 

 PASTEURIZER 



FIG. 29 



course, be employed only where an electric current 

 is available. This current, however, may be fur- 

 nished by a small inexpensive dynamo, which can 

 be operated at any plant where power is available. 

 Both these forms of control work in a satisfactory 

 manner. Of course, they are somewhat delicate 



137 



