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ILLINOIS DAIRYMEN'S ASSOCIATION. 



SLIDES NO. 5— A AND B. 



PAIL NO. 1. 



PAIL NO. 2. 



No. 5. A and B.— SI owing effect of careful milking on bacteria in milk. A is a plate 

 culture made from a droplet of milk as ordinarily secured. B is the same made 

 from an equal quantity Of milk that has been more carefully handled. Each white 

 spot is a colony that is developed from a g^rm that was originally present in milk. 

 Owing to the exclusion of bacteria by careful milking, plate B has fewer colonies. 



