286 



Ethel McLennan : 



(2) Low co)iductivity water. 



I liave to rliank Dr. Rivett, of the Chemistry Department, Mel- 

 Jbourne University, for the use of a still, the pattern of which was 

 first described by Hartley, Poole and Campbell (28), and which 

 readily yields water of conductivity as low as 0.4x10—^ mhos. 

 Tlie method employed is briefly as follows: — 



Ordinary distilled water is boiled for about 10 mins. in a 10 

 litre copper vessel, open to the air, and this is connected to the 

 apparatus shown in text-figure 8. 



<Cooli 



OOi'Z no 



^ oil fir 



\J 



3 



r 



T 



i 



Text- Figure 8. 



A diagram of the condenser used in preparing low condctivity 

 water, AH = condensing tuba; E = collecting funnel ; C and D 

 = Copper sheet bafifles; G = tin flap welded to AB to prevent 

 condensate from soldered junction running down A.B. 



