8. Acidic Mineral Water from White Island.
Was collected by the Survey in 1868. As received it was colourless and
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:—
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|Sulphate of iron (proto)||1059|
|Chloride of alumina (sesqui)||1703|
|Hydrochloric acid, free||9547|
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.*
[Footnote] * Trans. N.Z. Inst., III., 278.