THE USE OF THE BABCOCK TESTER 9 



Repeat operation, using each separator in dairy 

 room and note difference in skimming, simplicity, 

 and ease of running. Cool cream immediately after 

 separating. 



EXERCISE IV 



THE USE OF THE BABCOCK TESTER 



Examine the tester and bottles carefully. Note 

 that the principle of centrifugal force in tester is 

 same as that of the separator. Mix thoroughly a 



FIG. 10. Babcock Tester 



sample of whole milk of about 60 F. by pouring 

 from one vessel to another several times, so as to 

 obtain an aliquot part of the mixture. Draw a 

 sample of this milk into a 17.6 c.c. pipette by placing 

 the mouth over the upper end and sucking the air 

 out of the tube. When the milk rises above the 

 17.6 c.c. mark remove the lips from the tube and 

 place the index finger over the end of the same. 



