A DAIRY LABORATORY GUIDE 51 



EXPLANATION. EFFECT OF SPEED OF 

 MACHINE ON BABCOCK TEST 



The following- exercise illustrates the influence of 

 the speed of the machine on the amount of fat 

 brought to the surface. The speed of the machine 

 is important, because the greater the speed the more 

 force exerted. One should always run a Babcock 

 tester up to the speed indicated in the directions for 

 running- the machine. Sometimes one will make as 

 good a test when running a machine slow as when 

 running faster. This, however, is not always the 

 case, and in operating the tester one must be sure 

 that the machine is run fast enough to bring all of 

 the fat into the neck of the bottle. 



