206 



PASTEURIZATION 



almost every city of any size requires it would seem to indicate 

 that it should be made compulsory. Since the hand cream sep- 

 arator has been generally adopted on the farm, pasteurization 

 seems more necessary than before, as the washing and cleansing 

 of all dairy utensils, including the separator, is left to the farmers, 

 and it is only reasonable to suppose that some of them are care- 

 less. Hence, we can see the necessity for pasteurization from a 

 hygienic standpoint if from no other. 



FIG. 67. The Simplex regenerative 

 pasteurizer (assembled). 



FIG. 68. The Jensen pasteurizer. 



Sanitation Must Accompany Pasteurization. The chemical 

 and bacteriological laboratory of the American Association of 

 Creamery Butter Manufacturers analyzes, chemically and bac- 

 teriologically, samples of butter sent in by members. Thousands 

 of analyses are made during the year. It is found that the butter 

 that contains the lowest counts of yeasts and molds is invariably 

 produced in the best creameries. Certain species of bacteria, 



