8o 



DAIRYING 



COLD #** 



HOT 



Plate 35. Sectional view of another type of Regenerative Cooler. 



The machines shown in Lesson V, pp. 62-63-64, are now used 

 for pasteurizing milk and cream by this method. 



THE CONTINUOUS HEATING PROCESS. 



805. In supplying cities with milk the question of pasteuriz- 

 ation is usually considered from a commercial standpoint only. 

 The dealers naturally wish to reduce expenses to the lowest 

 terms but at the same time gain any advantage possible from 

 the improved keeping quality of pasteurized milk. The contin- 

 uous process of pasteurization has therefore appealed to them as 

 better adapted to the handling of large quantities of milk than 

 the intermittent process. The principal thing that has led to the 



