Contamination of Milk. 43 



Stall-fed animals, however, are more likely to have 

 their Hanks fouled, unless special attention is paid to 

 the removal of the manure. All dairy stalls should be 

 provided with a manure drop which should be cleaned 

 as frequently as circumstances will permit. 



The animal contributes materially to the quota of 

 germ life finding its way into the milk through the dis- 



FIG. 9. BACTERIA ON HAIRS. 



Each colony on the hair represents one or more bacteria that 

 were adherent to the hair when it was placed on the surface 

 of the solid culture-medium. 



lodgment of dust and filth particles adhering to its 

 hairy coat. The nature of this coat is such as to favor 

 the retention of these particles. Unless care is taken, 

 the flanks and udder become polluted with fecal matter, 

 which upon drying is displaced with every movement of 

 the animal. Every hair or dirt particle so dislodged 

 and finding its way into the milk-pail adds its quota of 

 organisms to the liquid. This can be readily demon- 



