THE BABCOCK TEST 201 



then release finger and allow the milk to flow into the bottle, 

 blowing the last drop from the pipette. A second sample of 

 the milk should be taken in the same way as a duplicate. 



Fill acid measure to the mark (never draw acid into pipette) . 

 The acid is very strong and should be handled with the great- 

 est caution. Water should be at hand to remove quickly any 

 acid coming in contact with the hands or other parts of the 

 body. Take the milk bottle by the neck between thumb and 

 fingers of the left hand so that the bottle can be turned ; 

 now bring the lip of the acid measure to the mouth of the 

 bottle and pour the acid into the bottle so that all of the 

 milk will be washed from the neck into the bottle. Hold the 

 bottle at a slant while doing this so that the acid will not fall 

 directly on the milk and form pieces of charred curd. 



Give the bottle a rotary motion in order to cause a gradual 

 mixture of milk and acid; sudden mixing will cause large 

 amounts of heat and gas and will throw the material out of 

 the bottle. 



After the bottle has been stirred thoroughly and the curd 

 is dissolved, place the bottle in the Babcock tester and whirl 

 five minutes. 



Place the bottles in the water bath of 180 F. for five 

 minutes and fill with hot water to the neck. 



Whirl for two minutes. 



Place in water bath for five minutes and fill with hot water 

 to within one half inch of the top of the bottle. 



Whirl for two minutes. 



Place in water bath, 130 F., for five minutes. 



Measure the fat column by placing one point of the dividers 

 at the bottom and the other at the top, then keeping dividers 



