THE BABCOCK TEST 49 
too much time. Indeed, with these substances weighing 
is not necessary as sufficiently accurate samples are ob- 
Fig. 8—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. 
