28 



BULLETIN 202, U. S. DEPARTMENT OF AGRICULTURE. 



impossible in a limited space. A glance at the plot which shows the 

 90 per cent alcohol titration and the bacterial count of 116 samples 

 indicates clearly that there is no definite relation between them. In 

 figure 2 we have plotted in the same way the 80 per cent alcohol 



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Fig. 1.— Relation o falcohol titration to the bacterial count of milk. Titrations of 116 samples of raw 

 and pasteurized market milk with 90 per cent alcohol. 



titration and the bacterial counts. It may be seen that among the 

 116 samples plotted there is a wide range in titration of samples 

 with low arid high bacterial counts. Some samples with a low count 

 show a low titration and others a high titration. Among samples 

 with a high count some show a low and others a high titration. 



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Fig. 2. — Relation of alcohol titration to the bacterial count of milk. Titrations of 116 samples of raw 

 and pasteurized market milk with 80 per cent alcohol. 



Our results indicate that there is no definite relation between 

 alcohol titration and acidity unless the acidity is more than about 

 2.20. This is shown in figure 3, where 116 samples are plotted ac- 

 cording to their acidity and titration with 90 per cent alcohol, and 

 also in figure 4 ; where the 80 per cent titrations and acidities are 



