22 



different health authorities varies from 10,000 to 50,000 bacteria per c.cm. 

 In every case but one the hand-drawn milk was as pure as "certified" 

 milk, while in all the machine-drawn samples the limit was far exceeded. 



Table I. Bacteria per c.cm. (about 20 drops) in Machine-drawn Milk and 



Hand-drawn Milk. 



* Mixed milk of two cows. 



In the next series of samples, the aim was to determine the effect of 

 boiling- the rubber parts and cover of the milker once a week. The results 

 are shown in Table II. 



Table II. The Effect upon the Bacterial Content of Machine-drawn Milk, 

 of Boiling the Milker Once a Week. Bacteria per c.cm. 



* Mixed milk of two cows. 



