New York Agricultural Experiment Station. 83 



Grand average: Whole milk, 309; strippings, 86; difference, 223. 



vacuum cleaning of cows is not desirable from a financial point of 

 view. 



SOURCES OF CONTAMINATION IN MILK. 



The low germ content of the milk at the close of the milking pro- 

 cess and the lack of any measurable influence of the stable upon 

 the germ content, raised the question as to what are the important 

 sources of bacteria in milk. 



Accordingly the germ content of a pail of milk was followed on 

 17 days from the cow through the various operations in preparing 

 it for the consumer. In the Station dairy the milk is taken to a 

 small milk room, separated from the stable by a single door, poured 

 over a conical cooler which is filled with cold water, collected in 

 a second pail and taken in this to the dairy. Here it is passed through 



