THE CLEAN RINSE 



73 



THE CLEAN RINSE 



A most important operation is the clean rinse. 

 This means the use of clean cold water or clean 

 warm water to wash away all traces of soda or 

 alkali powder after brushing. It should be used 

 in abundance enough to give a thorough rinse. 



STERILIZING BY STEAM 



The purpose of steril- 

 izing is to kill bacteria. 

 Some bacteria are so 

 tough that they are 

 not killed by heat lower 

 than the heat of boiling 

 water. The most per- 

 fect sterilizing is done 

 by steam in a metal 

 sterilizer under several 

 pounds pressure. Such 

 sterilizers are beyond 

 the reach of the aver- 

 age dairyman. A jet 

 of steam will do good 

 sterilizing if a can or 



pail is kept over it long enough, but a momentary 

 application does not sterilize it. 



