136 DAIRY FARMING 



too much time. Indeed, with these substances weighing 

 is not necessary as sufficiently accurate samples are ob- 



Fig. 29 Two styles of Babcock testers. 



tained by measuring which is the method universally em- 

 ployed. In making a Babcock test it is of the greatest 

 importance to secure a uniform sample of the substance 

 to be tested. 



