90 



Bulletin No, 34, 



There is one source of contamination, however, before the 

 milk reaches the outside. That is the small quantity of milk re- 

 maining in the milk duct of the teat from one milking to another. 

 Into this receptacle germs work their way. Here conditions for 

 growth are so favorable that by the next milking many thousands 

 are ready to be carried out into the milk pail by the first few streams 

 of milk. By milking this fore milk, as it is called, into a pail re- 

 served for that purpose and feeding it to calves or pigs at home 

 this source of trouble may be avoided. 



Fig. 8. Cows in stanchions, 



The rest of the trouble comes from without. Every particle 

 of dust in the air of the corral, and every hair and bit of dirt on 

 the body of the cow and the clothing of the milker is covered with 

 countless germs. Thousands and thousands of them find their 

 way into the milk. In order to avoid needless contamination 

 from these sources much care must be exercised. 



In the first place the corral should be kept clean. The manure 

 should be cleaned up and hauled away regularly and not allowed 

 to collect, until the corral fence simply encloses one big flat manure 

 pile with a surface of dry, powdery particles of pulverized dung 



