Sxey.—On the Mineral Waters of New Zealand. 445 
The first time that this character of the water was elicited was in May, 
1872, when I had a small phial of it presented to me by Mr. Douglas 
McLean, and in my official report thereon I stated that it gave a good 
reaction of iodine to the proper tests even when unconcentrated, a proof of 
the richness of any water in iodine, and that by chromatic tests it was 
ascertained the quantity of this element present in a gallon of the water 
would not be less than one grain. Further, I urgently requested a 
sufficiency of this water, to allow of a complete analysis being made upon it, 
and this I was promised; but the difficulties attending the transport of 
bulky parcels from these springs here for several years prevented this 
promise being fulfilled until April 16, 1877, when a large keg of this water 
(b) was delivered here by Mr. Alex. Sutherland, and I was then enabled to 
make a very full analysis of it, and note with considerable exactitude its 
general properties. It proved to be a clear and strongly saline water charac- 
terized by the presence therein of a very large proportion of sodice chloride, 
and an amount of iodine unusual for natural water, a considerable portion of 
which is very singularly in a free state. It manifests very distinct alkaline 
reaction, even at common temperatures and when unconcentrated. Lithia 
appears to be absent, at least I could not detect it, even spectroscopically, 
in the spirituous extract of the salts contained in half a gallon of the water. 
The total quantity of matter which I have determined in one gallon of it 
is 1474-096 grains, the constitution of which I have made out as follows :— 
Chloride of sodium 
3:329 
T potassium e e ne Re: -501 
» magnesium +s m Pr ws 34-960 
p calcium .. x EX ME LE .. 120-885 
ione of magnesium .. as s na $i "582 
mide of magnesium : traces 
Sulphate of lime s e. ay s4 es 8:026 
Phosphate of alumina Ms oe “We H *641 
s iron | 3 traces 
ue lime <v x TE * xe -430 
Bi-carbonate of lime .. i A m i 6:451 
. Silica cR ne = A i. SM 1:696 
Iodine, free .. E. 3 1:595 
1474-096 
- 
Total quantity of iodine to the gallon (free and combined) 2-127 grains. 
_ This water appears to be therefore a strongly chlorinated one, unusually 
rich in iodine, and, as before stated, is remarkable, and I might almost say 
unique, in having a portion of the iodine in a free state. The last circum- 
Sis has induced me to request a further sample of the water, to be taken 
under especial precautions to avoid the introduction of anything into it 
