Relation of Bacteria to Market Milk. 87 



from a recognized, licensed veterinarian or regular dairy 

 inspector is filed with the Milk Division, showing that 

 such suspicious cow or cows are free from infectious dis- 

 ease. Milk from cows reacting to tuberculin shall be re- 

 jected unless it shall have first been pasteurized at a tem- 

 perature of 170 F. or over for thirty seconds or longer in 

 a stream not less than a quarter of an inch thick. Milk 

 from cows fifteen days before and one week after calving 

 shall be rejected. Cows must be kept as clean as possible 

 on flanks, belly, udder, and tail. Long hair must be 

 clipped from the udder and sufficiently from the tail to 

 clear the ground. The feeding of slops, refuse of any 

 distillery or brewery, glucose or any malt and ensilage 

 that has been subject to fermentation, putrefaction or de- 

 composition is prohibited. Pure water in sufficient 

 quantities must be at hand at all times. The cows must 

 not be overheated by hard driving, nor be allowed to- 

 stand in mud holes, dirty sloughs or ditches. Mud holes r 

 dirty sloughs and ditches shall not be allowed to exist in 

 the pastures or cow yards where cows for the production 

 of milk are kept. 



Condition of barnyard. The barnyard or cow barn 

 must be kept reasonably clean and free from mud, soft 

 manure and must be well drained. Piles and heaps of 

 manure shall not be less than twenty-five feet away from 

 any stable door or window between December first and 

 April first and not less than three hundred feet away 

 during the other months of the year. 



Stable. The floors must be tight, preferably con- 

 structed of cement, and free from defects. The ceilings 

 should be tight if a storage loft is kept above. The walls 

 should be whitewashed every spring and fall and kept 



