
Fic. 39 
MILKING MACHINES 109 

it. See table 26. \ 
FIRST TREATMENT OF THE MACHINES. 
At the beginning of these experiments, a test was made to 
determine the influence upon the germ content of the milk 
when the machines were washed as the ordinary dairy utensils 
are frequently cared for on the farm. During this time the 
machines were simply washed at night by pumping warm 
water through them. This was done by connecting the ma- 
chines to the vacuum system near the sink and plunging the 
teat cups into the water in the sink, which was then drawn 
through the tubes into the milk pail. After this thorough 
rinsing, the machines were allowed to stand until the next 
morning. ‘This method of washing is illustrated in Fig. 
39. After the morning milking, the machines were all taken 
apart, as shown in Fig. 40, and the tubes and teat cups 
were more thoroughly washed with the aid of a long handled 
brush. Hot water with washing powder was used, after which 
the tubes were rinsed with clean water and hung up in the open 
air until needed for the evening milking. 
The pails were sterilized in the steam sterilizer for one 
—Showing method of rinsing machine by pumping water through 
