446 



Transactions. — Chemistri]. 



T/liich would liberate this element. I may state here that I have not yet 

 heard of the existence of free (native) iodine being authoritatively announced. 



This water comes under the sub-class alkaline chlorinated water, and 

 therefore resembles those of Wiesbaden, Kreuznach, and Aix-la-chapelle 

 of the continental waters, and those of Cheltenham, Harrowgate, and 

 Leamington of the English ones. It is, however, remarkable for its 

 generally superior strength over the English water of this class, and there- 

 fore should manifest medical effects in a corresponding proportion when 

 properly tested. 



15. Mineral Water from nortliern boundary of Wellington. 



Another water of the same class as the above, but one considerably less 

 iodized, is that from a mineral spring occurring about the Wellington 

 boundary of the run of Mr. Douglas McLean. Its characters are as 

 follows : — Somewhat turbid, has a decidedly saline taste, and is feebly 

 alkaline to test j)aper. Its principal constituent is chloride of sodium ; it 

 differs from sea-water, however, in containing a notable quantity of car- 

 bonate of soda ; also in giving a very distinct reaction of iodine to the 

 proper tests for this substance, even when these are applied to the water as 

 unconcentrated. The following results of its analysis are expressed in 

 grains per gallon : — • 



Soda .. .. .. .. .. .. 219-310 



Potash 



Lime 



Magnesia 



LitMa 



Iron oxides 



Silica 



Chlorine 



Sulphuric acid 



Carbonic acid 



Iodine and bromine 



2-833 



2-219 



7-158 



traces 



1-481 



6-418 



240-362 



•715 



18-444 



traces 



498 -940 



These results allow of being expressed in the following manner :- 

 Chloride of sodium . . . . . . . . . . 392-594 



Chloride of potassium 

 Iodides and bromides 

 Sulphate of soda 

 Carbonate of soda 



,, magnesia 



,, lime 



,, ii'on 



Silica 



not estimated 

 1-269 

 18-604 

 15-031 

 3-961 

 2-386 

 6-418 



444-711 



