MAKING THE TEST: DRAWING SAMPLE 



307 





r 



r 



i ^Ml^ifl 



Fig. 103. — Acid measures, a is preferable to b on account of the fiaring base, which 

 renders it leas liable to tip over, and the lip out of which the acid is pouied is not so wide 

 from side to side, thus easier to pour from without spilling. 



on tlie side of the container. This should be carefully rinsed off 

 by the rotary motion of the milk. With pipette grasped firmly 

 in the hand, as shown in figure 105, with thumb and two fingers 

 serving to hold the instrument ; little finger acting as guide, and 

 fore finger to be used as a valve, draw the milk into the pipette, 



