24 BULLETIN 890, U. S. DEPARTMENT OF AGRICULTURE. 
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Fig. 13.- — Temperature controller for heating milk to desired temperature in pasteur- 
ization. 
There should be a supply tank between the milk coolers and the 
fillers. If anything happens to the fillers it will not be necessary 
then to shut down the pasteurizer. The supply tank will equalize 
the flow of milk from the pasteurizers to the fillers. 
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