Pe eee, 
© re a ee ee 
“ a or 
STUDIES OF MARKET MILK. 177 
34.3 per cent. The stable where this milk was produced was 
probably the least expensive in structure of any of the thirty 
barns studied, the stable being built simply as a lean-to on the 
end of the hay barn and constructed of cheap lumber. ‘This 
stable was, however, the cleanest of the entire series. ‘The 
stables were kept in good condition and the cows thoroughly 
groomed and clean. At milking time the udders were wiped 
with a dry cloth and considerable care taken to prevent dirt 
from falling into the milk. This fact is also clearly shown by 
the figures representing the dirt content as given in the table. 
It will be seen by these figures that the milk never went above 
the scale of 3 and was usually either 1 or 2. This milk aver- 
aged as clean as the milk of any of the thirty producers. 
The stable of producer No. 1 is located at the side of the 
barn floor and is in fairly good condition. This is one of the 
best type of stables found. While the stable is in some re- 
spects better in arrangement than that of producer No. 2 the 
cows were not so well cared for and less care was taken to pre- 
vent dirt from getting into the milk, It is evident that the 
difference in care at milking time accounts for the difference in 
the amount of dirt contained in the milk of these two men. 
Discussion of group 2.— All of the producers whose milk con- 
tained an average germ content greater than 100,000 and less 
than 500,000 per cubic centimeter are included in this group. 
More producers come within this group than any other, there 
being eleven or 36.6 per cent. of the entire number whose milk 
was examined. ‘There is considerable range in the germ con- 
tent ’of the milk of the different men which are grouped to- 
gether here. The lowest average is that of producer No. 3 
given in Table 27, this average being 105,800 bacteria per 
cubic centimeter. From this the average for the different men 
increases until we reach producer No. 13, Table 37, whose 
average for the entire series of experiments is 458,500 bacteria 
per cubic centimeter of milk. 
