THE PASTEURIZATION OF MILK 



makes are on the market which perform excellent 

 work. Some of these employ revolving brushes, 

 which are automatically forced into the bottles, in 

 which a strong washing solution has been placed. 

 In others, the cleaning is accomplished by inject- 

 ing under high pressure jets of washing solution 

 into the inverted bottles. This type of machine is 

 that which is in the most general use at the pres- 

 ent time. 



As usually constructed, this washing apparatus 

 is a long machine, in which are placed several 

 tanks for containing the washing and rinsing 

 fluids. One tank contains a strong washing solu- 

 tion, another contains water for the first rinsing, 

 and a third contains clean water for the final rinse. 

 Over these tanks are placed plates having a sur- 

 face area of about the same size as that of the top 

 of a bottle case. These plates are perforated, and 

 powerful pumps force the liquid in the tanks 

 through these perforated plates in such a way that 

 the liquid is forced upward into the bottles, which 

 are inverted in cases over them. An automatic 

 feed pushes the cases from plate to plate along a 

 track made for the purpose. The bottles thus get 

 first a cleaning with the fairly hot washing solu- 



