PASTEURIZATION. 185 



mortality has been reduced by one-half where even 

 only part of the city milk has been pasteurized. 



Ideal conditions on dairy farms under which sani- 

 tary milk and cream can be prodaeed at a price 

 within reach of the working men have not yet been 

 attained and it seems doubtful that they ever will be. 



234. That aJI milk used for city supply not classed 

 as certified or inspected is recommended to be pas- 

 teurized (Govt. Bui.*), is a step in the right direc- 

 tion and deserves the attention of all right minded 

 milk dealers and city officials. In the future we shall 

 have more city officials who favor pasteurization as 

 a legitimate means by which the public will be sup- 

 plied with better and safer milk. Far-sighted busi- 

 nessmen recognize not only the commercial A^alue of 

 pasteurization but also its value as a means of pre- 

 venting the spread of disease. Nathan Strauss says : 

 "I consider pasteurization of the milk supply — and 

 the great majority of the scientific world agrees 

 with me — one of the most important weapons in 

 fighting the white plague." 



235. Bacteria in market milk. In fifty-seven sam- 

 ples of Boston milk, Sedgwick and Batchelder found 

 from ,30,000 to 4,220,000 bacteria per cubic centi- 

 meter. Hill and Slack on examining 2,394 samples, 

 nearly all taken as the milk arrived in the city, 

 found that 42 per cent of the milk contained less 

 than 100,000 bacteria per cubic centimeter; 29.75 

 per cent contained between 100,000 and 500,000; 

 12.75 per cent contained between 1,000,000 and 

 5,000,000; 9.75 per cent contained between 500,000 

 and 1,000,000 ; and 5 per cent contained above 



• Government Circular n4, page 7. 1907. 



