MAKING CERTIFIED MILK. 157 



portimity to secure all the milk business of the 

 family. 



The Faxm End of the Certified Milk Work.— 

 The first important matter in the farm end of 

 the work is to apply the tuberculin test to the 

 cows in the herd. In the first application of the 

 test to my herd, we found three per cent of the 

 cows tuberculous. All of the tuberculous cows 

 had been bought one and a half years previous 

 to the application of the test and not one of the 

 herd raised on the farm was found to be tuber- 

 culous. I found tuberculous cows frequently 

 among those bought even when I selected them 

 myself. It is well known at the present time 

 that a cow may be tuberculous and there be no 

 outward indication of it. 



Responsibility of Dealers. — Those who wish 

 to undertake the production of this kind of 

 milk for feeding infants and invalids, should 

 realize the responsibility of this work before 

 entering the field. They should realize that they 

 have human lives entrusted to them to the same 

 extent as the doctor. They should know that to 

 neglect their work may mean death to some lit- 

 tle one that is being fed this milk. They must 

 know that the cow must be fed properly and 

 regularly with food that will keep her always in 

 perfect physical condition. She must have the 

 purest water and kindest treatment and must 

 never become excited by a dog, boy, a man on 



