FROM THE PRACTICAL VIEWPOINT 



great amount of piping, however, renders it diffi- 

 cult to keep clean. 



Washing of Containers 



It is of course important that containers in 

 which pasteurized milk is placed shall be thor- 

 oughly cleaned and sterilized. There can be little 

 advantage gained in the proper pasteurization of 

 milk if it is to be immediately placed in contain- 

 ers which are not free from all dangerous bacteria. 

 The relative importance which the cleaning of cans 

 and bottles has in the bacterial content of milk 

 has not been recognized to the extent which it 

 deserves. 



Cracks and open seams, especially in milk cans, 

 may harbor particles of milk which are heavily in- 

 fected with bacteria, which in many cases are of a 

 type which are difficult to destroy by ordinary 

 methods. Especially is this true if the cans or 

 covers contain moisture, since this aids in the de- 

 velopment of the bacterial life. 



It is undoubtedly true that the methods em- 

 ployed in washing bottles are generally much more 

 satisfactory than those in use in handling the cans 

 and covers. Bottle-washing machines of various 

 163 



