H.—l3

8

X" 0 . 5. —From Koroteoteo, or the " Oil Bath," at AVakarewarewa. This is a strong boiling stream, the recorded temperature being 214° from two springs, one of which, surrounded by beautiful sulphur incrustations, throws a powerful jet to a height of 20 feet. The water is distinctly alkaline (or slightly caustic), which is probably the reason for its being termed an " oil bath." Analysis. Mono-silicate of soda ... ... ... ... ... 2'oB Mono-silicate of lime ... ... ... ... ... 316 Mono-silicate of magnesia ... ... ... ... '76 Mono-silicate of iron ... ... ... ... ... '85 Sulphate of soda ... ... ... ... ... 749 Chloride of potassium ... ... ... ... ... 146 Chloride of sodium ... ... ... ... ... 6634 Chloride of lithium ... ... ... ... ... traces Silica, free ... ... ... ... ... ... 22-40 Phosphate of alumina ... ... ... ... ... traces 10454 No. 6.—Otukapuarangi, the Pink Terrace of Rotomahana. This terrace has been built up round a great circular pool 180 feet in diameter, from which there is a strong outflow of clear bright water, having a temperature of 204° to 208°, and depositing siliceous sinter of a delicate pink tint in large quantities. As received, the water was faintly acid, changing to alkaline when boiled, Analysis. Silicate of lime ... ... ... ... ... I'9l Silicate of magnesia ... ... ... ... ... I'l6 Chloride of potassium ... ... ... ... ... I'os Chloride of sodium ~. ... ... ... ... 9355 Sulphate of lime ... ... ... ... ... 1096 Sulphate of soda ... ... ... ... ... 101 Alumina as phosphate ... ... ... ... ... '54 Silica, free ... ... ... ... .., ... 4395 Iron oxides ... ... ... ... ... ... traces 15413 No. 7. —Manupirua, on the south-east shore of Rotoiti, a beautifully clear pool 20 feet in diameter, having a temperature of 107° to 110°, at the foot of a high pumico cliff on the shore of the lake. The water is clear, with a bluish tinge, harsh to the touch, and deposits sulphur. This pool has a strong outflow of 40 or 50 gallons per minute, and is reported to have great curative properties. Analysis. Mono-silicate of lime ... ... ... ... ... 151 Mono-silicate of magnesia ... ... ... ... '77 Mono-silicate of iron ... ... ... ... ... '99 Sulphate of soda ... ... ... ~. ... IPSO Sulphate of lime ... ... ... ... ... 243 Chloride of potassium ... ... ... ... ... '47 Chloride of sodium ... ... ... ... ... 625 Silica, uncombined ... ... ... ... ... 853 3245 No. 8. —From Kauwhanga, IJ miles from Ohinemutu, a powerful sulphur bath, having a temperature of 204°. The water as received was clear and colourless, with a distinct acid reaction, and evolving an offensive odour, and depositing a brownish sediment on being boiled. This bath is reputed to have great curative properties, and is known to tourists as the " Pain-killer." Analysis. Sulphate of potash .. ... ... ... ... 296 Sulphate of soda ... ... ... ... ... 3437 Chloride of sodium ... ... ... ... ... 5916 Chloride of calcium ... ... ... ... ... 3-33 Chloride of magnesium ... ... ... ... ... 127 Chloride of iron ... ... ... ... ... -25 Phosphate of alumina ... ... ... ... ... traces Silica ... ... ... ... ... ... 1609 Hydrochloric acid ... ... ... ... ... 760 Sulphuretted hydrogen ... ... ... ... ... 201 12704 No. 9. —Cameron's Bath, situated in the same locality as No. 6. It is a muddy pool 20 feet in diameter, having a temperature of 109° to 115°, but kept in a state of ebullition by a powerful escape of gas, which causes faintness when inhaled. The pool has no outflow, and the water is a dirty chocolate colour. As received the water had a persistent acid reaction and offensive odour, aud had deposited a siliceous sediment in large quantities.