7O STORRS AGRICULTURAL EXPERIMENT STATION. 
into the Stadtmueller covered milk pail. The numbers of 
bacteria, therefore, are not as large in either case as they would 
have been had the milk been drawn into an ordinary open pail. 
Each day the two groups of five cows were alternated. This 
was done in order to avoid any error which might be caused by 
the difference in germ content of the udders of individual cows. 
Both sets of cows were milked by the same man and the treat- 
ment given to both lots was the same, the feeding being the 

Fic. 21. The Stadtmueller covered pail used in these experiments. 
only difference. The hay used in these experiments was of 
good quality and was not as dusty as the average hay fed to 
cows. The hay was put down through a chute from the floor 
above into the feeding alley and fed as would ordinarily be done 
without any unnecessary shaking. ‘The grain wasa mixture of 
wheat bran, cotton seed and gluten. This was drawn into 
measures from a chute in the feeding alley and distributed to 
the individual cows. The results of these experiments are 
given in Table 20. 
