THE RELATION OF MICROORGANISMS TO MILK. 



305 



time, the atmosphere of the stable will be completely filled with organisms 

 which may settle into the milk while it is exposed during the process of 

 milking. The effect of this source of contamination may be seen by the 

 following experiments: 



FIG. 77.- -Some different styles of small top milking pails which 

 are practical and efficient. (Original.) 



Bacterial Content of Milk as Affected by Feeding Dry Hay and Grain. 



DAIRY UTENSILS. All utensils which are to be used in connection 

 with milk should be so constructed that there are no cracks or crevices 

 in which the milk can accumulate and from which it is not easily washed 

 out. A milk pail with an open seam may be the cause of serious trouble 

 in the dairy. The dairy utensils should be simple in construction, and 

 so made that they can be thoroughly cleansed with ease and made of 

 such material that they can be thoroughly sterilized either with water 

 which is actually boiling or in steam. 



20 



