3rd. Badly ventilated stables and wrong system of 

 ventilation. 



4th. Dirty stables and yards and insufficient clean- 

 ing- of the cows, udders and hands* 



5th. The tubes and teatcups of the milking-ma- 

 chine, if in use, are not clean. 



6th. The test-glasses have not been sterilized. 



When only a few tests are abnormal, the cause may 

 be found with the individual cows and may be : 



7th. Carelessness of an individual milker, if all the 

 defective tests originate from cows milked by the same 

 person. 



8th. The cows in question may be in heat. 



9th. The cows may have garget in one or more 

 quarters. 



10th. They may be otherwise diseased. 



llth. The milk may contain colostrum-milk, or 



12th. The cows in question may be too far ad- 

 vanced in lactation. 



The fermentation-test may be very helpful in de- 

 tecting diseases in cows in time for successful treatment, 

 especially those of the udder. 



Summary and Conclusions: 



From the above results that the business of dairying 

 can only be carried out successfully by those who are 

 willing to go to the trouble of looking after a number 

 of details, and to see that the rules governing the pro- 

 duction of clean milk are once and forever enforced. 



Such enforcement need not necessarily lead to disa- 

 greement with the farmhands. It is more a question of 

 tact than of authority. 



The fact that many dairymen produce regularly 

 clean milk, proves that such may be done with no unrea- 

 sonable amount of work, trouble and expense. 



The education of the milkers may be of great as- 

 :, I 



