PRODUCTION OF MILK OF LOW BACTERIAL CONTENT.- 7 



tion was given to the stable except to remove manure. Dust was 

 allowed to accumulate in the barn ; consequently at the beginning of 

 the first experiment its condition was little if any better than that of 

 the average low-grade barn. During the experiment, which extended 

 from July 22 to August 14, the manure was removed once a week ; as 

 a result varying quantities of filth were present on the floor and on 

 the cows. A picture of the barn just before the weekly removal of 

 the manure is shown in figure 3. It will be noted that the gutter 

 was filled with manure and the floor almost entirely covered. 

 Figure 4 shows one of the cows at that time. It will be seen that 



Fig. 3. — Condition of barn during Experiment No. 1. 



the flanks, udder, and teats of the cow were almost entirely covered 

 with manure. The general type of milker employed through- 

 out the experiments may also be seen in the picture. Under such 

 barn conditions and with unsterilized utensils it seemed probable 

 that the bacterial counts obtained would be as high as those from any 

 other dirty barn. It is not intended to intimate that conditions in the 

 average barn in this country are as bad as these, but, as stated, for 

 the purposes of the experiment it was desired to have the worst pos- 

 sible conditions. 



Two cows were milked into open and the other two into small-top 

 pails, which were washed clean but not sterilized. The milk was 

 then poured into clean, unsterilized cans in the barn, after which it 

 was carried to the milk house, where samples were taken immediately 

 both night and morning. 



