The Babcock Test. 



31 



this way, there is 



and the milk is allowed to flow slowly down the inside 

 of the neck. Care must be taken that none of the milk 

 measured out is lost in this transfer. The portion of 

 the milk remaining in the point of the pipette is blown 

 into the test bottle. 

 The best and saf- 

 est manner of hold- 

 ing the bottle and the 

 pipette in this trans- 

 fer is shown in fig. 

 7. Fig. 8 shows a 

 position which should 

 be avoided, since by 

 holding the bottle in 



danger that some of the 

 milk may completely fill 

 the neck of the bottle, 

 and as a result, flow 

 over the top of the neck. 

 Pipettes, the lower 

 part of which slip read- 

 ily into the necks of the 

 test bottles, may be 

 emptied by lowering 

 the pipette into the 

 neck of the bottle till 

 it rests on its rim, when 

 the milk is allowed to 

 run into the test bottle. 

 37. Adding acid. The acid cylinder (fig. 9) hold- 

 ing 17.5 cc., is filled to the mark with sulfuric acid ol 





FIG. 7. The right way of emptying 

 pipette into test bottle. 



