154 



S. G. WALTON. 



proved the absence of iodine, but the yellow colour indi- 

 cating bromine was observed, the quantity of which only 

 amounted to traces. The test for iodine was rendered 

 more delicate by the addition of starch solution to the 

 mixture containing bromine, etc., and subsequently adding 

 drop by drop a solution of N/10 sodium hydrate, thoroughly 

 mixing after each addition, no traces of a blue colour being 

 noticed. 



Carbonates— This determination was carried out exactly 

 as described for the estimation of temporary hardness. 



Physical Characters. 

 Colour (in two foot tube) Peaty tint 



Clearness 



Odour 



Reaction to litmus 

 Sediment ... 



Fairly clear. 



None. 



Very slightly alkaline. 



Traces. 



Chemical Characters. 

 All the results are expressed in parts per 100,000, with 

 the exception of the gases, which are expressed in cc's. 

 per litre. 



1 



7*810 

 3-025 

 0-0005 



Total solids 

 Chlorine ... 

 Free ammonia 

 Albuminoid am- I ~. 



monia j 



Nitrogen as nitrite Nil 



nitrate 0*00239 

 Oxygen absorbed 



2 

 7*785 

 3*025 

 0*0005 



3 

 7*803 



4 



7-800 



'017 



037 



in 15 minutes J 

 Oxygen absorbed ) ~. 



in 4 hours j 

 Permanent hardness 



(calculated) 

 Total hardness (cal.) ... 

 Alkalinity(asCaOO 3 )l-20 



0*017 



nil 

 0-00247 



0-037 



082 0*084 



1*20 



Mean 

 7-800 

 3-025 

 0*0005 



0*017 



nil 

 0*00243 



0-037 

 0*083 



1-00 



2*20 

 1*20 



