COMPARATIVE STUDIES WITH COVERED MILK PAILS’ 89 
comparing the corresponding experiments in Table 21, parts 
A and B, it will be noticed that in each case there was a very 
marked reduction in the number of bacteria by the use of 
the covered pail. While the numbers of bacteria which gained 
access to the covered pail are very much higher than in the 
preceding experiments the relative difference between the 
germ content of the milk from the open and the covered pails 
is even greater than in the preceding experiments. It is evi- 
dent that the conditions were for some reason considerably 
ha ble 21; 
Efject of covered pail in stable where but little care is given to cleanliness. 
A. Open Pail. 

















Number of Total Acid Liquefying 
Experiment Bacteria Bacteria Bacteria 
DEMURE ATSIS Vg bel a ae ae 811,900 761,660 23,490 
INLD HAYS ARTS eae me 9,100,000 9,087,900 4,160 
NUS Soi Gs De oe 3,113,000 2,025,000 26,660 
OND SIGE BY Sa a AS 2 a ea 3,025,000 314,600 30,000 
NICE SL 2 Sho aN tee 4,470,000 2,443,000 » 26,660 
0s wok a a a ee a a ~ 115,400 21,040 10,000 
ESE CLS Sco 3,439,200 2,442,200 18,550 
B. Pail with Cover. 
Number of | Total Acid Liquefying 
Experiment Bacteria Bacteria Bacteria 
INTER A0Y bf 05 OU SRN Aue Oren 19,790 13,330 0 
J SICIERI UR 9 0 2k tae ean 219,160 189,800 0 
MOVATEL CAM OU tence 4 Ges 64,580 27,000 14,580 
UROTEL Le Gm PMA hoo) Ya | 90,000 32,000 4,000 
Jae OL aye) Oa a ara | 220,800 81,600 15,830 
PNTESLOCE Ommenist aio ..).3 7,290 3,000 166 
PY MOLA OO At, coke ts 103,600 57,800 5,760 
Average for open pail. 

Average for covered pail. 
Average difference in favor of covered pail. 
