PRODUCTION OP MILK OF LOW BACTERIAL CONTENT. 



11 



From the results it is possible to determine something of the value 

 of the small-top as compared with that of the open pail. The average 

 of the bacterial counts of milk from the small-top pail as given in 

 Table 2 was about 5,500 bacteria per cubic centimeter lower than that 

 of milk from the corresponding open pail. The true value of the 

 small-top pail, however, is more definitely shown in figure 5, in which 

 the bacterial count of each sample of milk is shown and plotted in 

 columns. The comparative heights indicate the difference in the 

 number of bacteria per cubic centimeter in milk from open and small- 

 top pails at the same milking. In 29 of the 36 samples the bacterial 

 count of milk from the open pail was higher than that from the small- 

 top. The results confirm the conclusions of previous investigators 

 as to the value of the small-top pail. 



EXPERIMENT NO. 3. (COWS AND FLOOR DIRTY, MANURE REMOVED TWICE A 

 WEEK, UDDERS AND TEATS OF THE COWS WASHED, UTENSILS STERILIZED). 



In Experiment No. 2 the use of sterilized utensils, as has been 

 shown, resulted in a remarkable lowering of the bacterial count. In 

 Experiment No. 3, where sterilized utensils were used, a second factor 

 was introduced, which consisted in washing the udders and teats of 

 the cows. 



The condition of the barn, as shown in figure 6, was the same as in 

 the previous experiments except that the manure was removed twice 



Fig. 6. — Condition of barn during Experiment No. 3. 



