BACTERIOLOGICAL STUDIES OF MILK SUPPLIES 171 



Of these thirty-one only five are above 100,000 germs per cubic 

 centimeter and only six above 50,000 germs per cubic centimeter. 

 As suggested in the first paper, if most of the dealers can, with only 

 the most meager municipal supervision, produce a clean milk, surely 

 the others should be compelled to meet the standard which has inde- 

 pendently been set by certain of the dairymen. 



CHART m I 



1,000,000 



500,000 



I 



..•I-.... I..!. III. 



ZiU^^UTi E9 505I 5Z 53 3A 35 36 37 38 » 40 41 42454445 4647 48 49 50 51 5255 

 Sample Number 

 BflCTCRIflLCOUNT 

 20 



I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 



B a S Z6 n ?8 Z9 30 31 32 35 54 55 5657 38 59 40 41 42 4544454547 48 49 50 51 XS> 



Sample Mumber 



REACTION 



As in the other series, we also find that the initial acidity — unless 

 very high — gives no indication as to the degree of contamination. 



In Chart II we present a tabulation of the results of the examina- 

 tion of all samples which show an initial count of less than 100,000. 

 Of the thirty-one of this series, twenty-six come in this class. Most 

 of these make an exceedingly good showing, in spite of the fact that 



