KHARTOMiM WATHU-SUl'l'LY 

 Diiti; uJ (JuUuutiuu, Jiuuuiry 1, 1908 



27 



The water was almost quite clear when it emerged from the pipe but became Physical 

 distinctly opalescent after a few minutes exposure to the air, and ultimately deposited '=haracters 

 a snjall amount of yellowish-red precipitate. The taste of the water was faintly 

 chalybeate. Its temperature was fairly constant at about 29 C. 



The points specially to be noted are the high proportion of ammonia, of iron and 

 manganese, and the presence of nitrites. The presence of an excessive amount of 

 ammonia, and of nitrites, is usually an indication of serious pollution ; but in the present 

 instance such a conclusion might be erroneous since ammonia is not uncommonly found 

 in deep wells known to be pure, and such ammonia is often, as in the present instance, 

 associated with iron. There could be no doubt, however, as to the objectionable nature crenothrix 

 of the iron and manganese found, and the prediction made at the time that i:reiwtlirix predicted 

 would sooner or later appear in the pipes was quickly verified. 



The mixed waters from Wells Nos. 1, 2, 4, 5 and 6 were next tested, on February 23, 

 after 72 hours' continuous pumping. The water was found to have a distinct odoin- as 

 it emerged from the pipe and was more turbid than the water from "Well No. 3 

 examined formerly. It contained masses of flocculent matter coloured by iron. The 

 interior of the pipe and the tin in which the water impinged at its exit were markedly 

 coated with a fungoid growth coloured by iron. The proportions of iron and manganese 

 found in this water were :— 



Parts per million 



Iron 

 Manganese 



1-20 

 0-22 



