Sxey.—On the Mineral Waters of New Zealand. 431 
transparent. A slight sediment had formed which mainly consisted of 
gypsum in crystalline forms. Its specific gravity is 1-088 at 60° Fah., and 
the total amount of dissolved matter present to the gallon is 13,638 grains, 
which is made up as follows :— 
Sulphate of iron (proto) ee .. oe so- L068 
» soda E i ‘ 658 
x potash : pe x * 275 
5 lime è 235 
A: magnesia um <s Ps ; 60 
» alumina e E é sd 80 
Chloride of alumina (sesqui) $ atc A MB 
Siliceous matter ET i" nik aie 21 
Hydrochloric acid, free eg ae =e ws 9547 
13,638 
This is therefore shown to be a highly saline water, and charged with 
free acid to such an extent as in all probability will render it useless for 
medical purposes. 
A full description of the mode of occurrence of this water and the 
geological structure of White Island have been given by Dr. Hector.* 
9. Acidulous Mineral Water. 
The water of a small lake—Waimangeao—near Patauki, Mount Edge- 
combe, is considered to be of a poisonous nature, owing to the fact that 
birds frequently fall into it when attempting to fly across. 
The sample of it which I had was not sufficient to allow of its complete 
analysis; it was forwarded by Mr. J. C. Young on the 31st of December, 
1873. 
Characters as follows-—Clear and tasteless and of a weak acid reaction. 
A red deposit had formed consisting of iron oxides, combined with organic 
matter. The water separated from this deposit yielded 11-084 grains of 
solid matter per gallon, and it contained a large quantity of carbonic acid 
besides to which its acidity is due. These solid matters had the following 
composition €— > — 
2:9 
puente iiie with beide. on traces o idein — x 4-928 
Sulphate of lime and magnesia ee aa m y 
Silica ee oe ee LE ee 2.954 
Iron oxides oe. oe ee oe oe traces 
11-084 
* Trans. N.Z. Inst., II., 278. 
