60 



BULLETIX 642, P. S. DEPARTMENT OF AGRICULTURE. 







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The value of these 

 factors was thor- 

 oughly determined 

 by experiments con- 

 ducted in an experi- 

 mental barn and fur- 

 t h e r demonstrated 

 by their successful 

 practical application 

 on several farms. 



In connection with 

 the production of 

 milk of low bacterial 

 content and which is 

 practically free from 

 visible dirt, it seems 

 evident from the re- 

 sults that undue 

 emphasis has been 

 given to factors and 

 methods of minor 

 importance, while 

 those which directly 

 affect the bacterial 

 content have not 

 been sufficiently em- 

 phasized. 



It must again be 

 pointed out that only 

 one phase of the 

 production of a sani- 

 tary milk has been 

 considered in this 

 paper. No attempt 

 has been made to 

 study the factors 

 which are most di- 

 rectly concerned 

 with preventing the 

 infection of milk by 

 pathogenic organ- 

 isms. The factors 

 affecting the health 

 of the cattle have not 



