1 66 PROTECTION OF THE CONSUMER. 



pasteurized. While the process is not an absolute protection 

 against digestive troubles it is to-day recognized as a useful 

 means of reducing them. 



Pasteurization on a Large Scale. The pasteurization of 

 milk has proved to be practical as a method of treating the 

 milk supply from distributing centers. A variety of machines 

 have been invented for pasteurizing milk in large quantities. 

 Some of these, called " continuous pasteurizers," are so con- 

 structed that a stream of milk flows into the machine at one 

 end, is heated and cooled, and flows out at the other end in a 

 constant stream of pasteurized milk. Another class of pas- 

 teurizers receives a considerable quantity of milk in a large 

 chamber, heats it to the required temperature, and holds it at 

 this temperature for any desired length of time. Of these 

 two methods the latter has proved to be the most efficient in its 

 action. Either of these types of pasteurizer is applicable for 

 the treatment of large quantities of milk, and their use makes 

 it possible -for a milk dealer to furnish his customers with a 

 supply of pasteurized milk. 



Such methods of treating the public milk supply have 

 been adopted in several cities. In Europe quite a number 

 of cities are now supplied by certain milk companies with 

 pasteurized milk, which is sold for a price either the same 

 as that of ordinary milk, or at a slight advance. This kind 

 of milk has been quite popular, and it has appeared that this 

 is, perhaps, the most satisfactory method of treating the gen- 

 eral milk product. In America the same thing has been 

 tried in a number of places, but, for various reasons, has not 

 been very successful. There appears to be a difficulty in 

 America to obtain a market, for the American public have 

 not been convinced that pasteurized milk is sufficiently 

 superior to the ordinary milk to warrant paying an advanced 

 price for the same. While, then, in our own cities pasteur- 

 ized milk is occasionally to be found upon the market, the 



