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No. 10. The Colonial Analyst, Dunedin, to the Colonial Seceetaey. Sib, — University Laboratory, Dunedin, 30th September, 1879. I have the honor to acknowledge the receipt of your communication, dated Ist August, enclosing copy of a letter from the Agent-General on the subject of mineral waters. Of purely mineral waters I have to state that only two samples have been examined by me : one, a magnesian water, from AVickliffe Bay, near Portobello —an analysis of which is appended; the other, a chalybeate water of good type, from the Chain Hills, in the District of Green Island. I have heard of three other mineral springs in Otago, but have not seen samples of them. From the particulars received, I have no doubt they contain abundance of sulphuretted hydrogen. One of these, Poynter's Well, is near Port Molyneux, on the road to the Nuggets Lighthouse. The second is in the Glenkennich District, near Tapanui. The third, at the base of Maungatua, in West Taieri. I have, &c., James G. Black, G. S. Cooper, Esq., Under Secretary. Colonial Analyst.

Results of analysis of mineral water from Wickliffe Bay, forwarded by Dr. Bakowell, 27th April, 1874:— Analysis. Grains per gallon. Sulphuric acid (combined)... ... ... ... ... 39-3 Chlorine ... ... ... ... ... ... 1120 Magnesia ... ... ... ... ... ... 18-3 Lime ... ... ... ... ... ... 11*5 Alkalis ... ... ... ... ... ... 830 Carbonic acid (combined) ... ... ... ... ... 126 No. 2.—Water, from Chain Hills, near Green Island, rich in carbonate of iron and free carbonic acid. Nos. 3, 4, and 5. —Springs in West Taieri, Glenkennich, and near Port Molyneux, described as containing sulphuretted hydrogen. James G. Black, Colonial Analyst.

By Authority : Geobge Didsbuby, Government Printer, Wellington. —1879. Price 9d\] 3—H. 13.

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