The Babcock Test. 



into a small glass beaker provided with a lip, or into a 

 small porcelain pitcher; these may be more easily 

 handled than the heavy acid bottle or jug, and the acid 

 measure is then filled from such a vessel. 



Where a considerable number of tests are made regu- 

 larly, the acid can be measured into the test bottles 

 faster and with less danger of spilling, by using some 

 one of the many devices proposed for this purpose. 

 There is some objection to nearly all of these appliances, 

 automatic pipettes, burettes, etc., although they will 

 often give good satisfaction for a time while new. Sul- 

 furic acid is very corrosive, 

 and operators, as a rule, take 

 but poor care of such appara- 

 tus, so that it is a very diffi- 

 cult matter to design a form 

 which will remain in good 

 working order for any length 

 of time. Automatic pipettes 

 attached to acid bottles or res- 

 ervoirs, to prove satisfactory, 

 must be made entirely of glass, 

 and strong, of simple construc- 

 tion, tightly closed and quickly 

 operated. 



51. The Swedish acid bot- 

 tle answers these requirements the side tube is made to hold 

 better than any other device 17 ' 5cc ' f 

 known to the writers at the present time. Its use is 

 easily understood (see fig. 18) ; it gives good satisfac- 

 tion if the hole in the glass stop-cock through which the 



FIG. 



Swedish acid-bottle; 



