THE USE OF THE BABCOCK TESTER 11 



or cylinder, being careful to pour the acid at an angle 

 of about 45 degrees down the neck of the bottle so 

 that it will not cause a violent reaction until ready 

 to be shaken. Revolve milk and acid with a gentle 



Fig. 14. — Pipettes 



rotary motion until the curd of the milk is entirely 

 dissolved. Place bottles in tester, being careful to 

 put the same number on opposite sides of the tester 



