134 



CREAMERY BUTTER MAKING 



plished (i) by admitting either "live" or "exhaust" steam 

 directly to the skimmilk; (2) by admitting either live or 

 exhaust steam to pasteurizers which do not allow the steam 

 to come in contact with the skimmilk. The former is 

 usually spoken of as the direct method, the latter as the 

 indirect method. 



Direct Method. This is the method most commonly 

 employed by creameries at the present time, and un- 

 doubtedly so because it does not require any special out- 

 lay for pasteurizers. Where this method is employed the 



EXHAUST STEAM 



SKIM 



CAPACITY 



MIUK TANK 



10.000 L.BS- 



SKIM MII_K 

 WE.ICHER_ 







SKIM MIL-K 

 PUMP 



Fig. 31. Skim-milk tank and pasteurizer. 



heating is usually accomplished by the use of the exhaust 

 steam from the engine. 



There are three objections to this method of pasteuriz- 



