THE BABCOCK TEST 



37 



per end of the pipette. The hole forming the outlet 

 should be of such a size as to allow the contents of the 

 pipette to flow out in 5 to 8 seconds. (See p. 277). 



MEASURE FOR ACID 



A cylinder of glass, like that shown in Fig. n, 

 with a lip to pour from and a single mark at 

 17.5 cc., is the form commonly used. Other forms 

 are shown in Figs. 12 and 13. These latter 

 forms, made so as to hold enough acid for 20 



FIG. 9 FIG. IO 



AUTOMATIC PIPETTE WAGNER^S PIPETTE 



FIG. II 

 ACID- MEASURE 



