218 PRINCIPLES AND PRACTICE OF MILK HYGIENE 



the hot water through the outer tube in the opposite 

 direction. The end connections are removable to facili- 

 tate cleaning. Fig. 26 shows a "starter can" adapted 

 to pasteurize small quantities of milk. It may also be 

 used as a cooler. 



D 



I I 



1 r 



it 

 u 



|i 



il 



ii 

 ii 

 u 



f 



. JL 



1 1 



4-k 



ii 



I 



+-M/LKTJNK 



XGVOLV/MG 



FIG. 26. (B. A. I. Circ. 184). 



In the "flash" method of pasteurization the milk 

 passes from the pasteurizer over a cooler. Sometimes 

 a regenerative cooler is used in which the milk to be 

 pasteurized flows down one side of a corrugated sheet 

 of metal and the milk coming from the pasteurizer flows 

 down the other side, the cold milk thus absorbing some 



