354 



DEPARTMENT OF THE XAYAL SERTICE 



For measuring the water-samples, a Knudsen's automatic pipette (fig. 4.) was 

 used. The pipette is provided with a stopcock, and after sucking up the water to a 

 little above the stopcock, the latter is turned; to empty the pipette the stopcock is 



Fig. 6. — Arrangement for chlorine titration. 



turned further round, so as to be open to the air. The pipette measure 15 or 20 

 ccm. For the titration a bulb-burette (fig. 5) was used with an upper stopcock (a) 

 perforated in the same way as in the automatic pipette. In filling and empty- 

 ing the burette tube by the stopcocks h and c the upper stopcock is used in 

 quite the same way as in the automatic pipette. From the burette the silver 



