24 



BULLETIN" 642, tJ. S. DEPARTMENT OE AGRICULTURE. 



from June 5 to 15, 1916. The average bacterial count of 15 samples 

 from the small-top pail was 2,667 and from the open pail 4,947 

 bacteria per cubic centimeter, as shown in Table 8. In the previous 

 series (Table 4) the average bacterial count was 2,154, compared with 

 2,667, the average count obtained in this series. The figures are par- 

 ticularly interesting, as they represent average counts of milk pro- 

 duced under similar conditions with periods of time about three 

 months apart. The bacterial counts of milk from the small-top com- 

 pared with open pails again show the value of the former type. 



Table 8. — Bacteria per cubic centimeter in dual samples of fresh milk pro- 

 duced under conditions described in Experiment No. 7. 



Date. 



Sample 

 No. 



Open 

 pail. 



Small-top 

 pail. 



Date. 



Sample 

 No. 



Open 

 pail. 



Small-top 

 pail. 



1916. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



4,900 

 21,300 

 3,700 

 3,100 

 4,900 

 3,700 

 2,800 

 7,500 

 2,900 



1,300 

 1,200 

 6,400 

 2,300 

 2,200 

 1,400 

 2,400 

 3,300 

 1,300 



1916. 



June 10, a. m 



June 10, p. m 



June 12, a. m 



June 12, p. m 



June 13, a. m 



June 13, p. m 



10 

 11 

 12 

 13 

 14 

 15 



3,100 



8,400 

 3,800 

 1,700 

 1,500 

 900 



2,300 





1,600 





5,400 

 4,600 







2,100 





2.200 











4,947 



2,667 

















Fig. 14. — Condition of barn during Experiment No. 7. 



