Skey. — On the Mineral Walers of New Zealand. 443 



No. (7). — From the alum caves at Orakeikorako, collected 1st May, 1878. 

 Differs from any of the preceding waters in containing a large quantity of 

 sulphate of lime. It gives evidence of possessing only traces of iodine. 



No. (8). — From the Crow's Nest, collected 1st May, 1873. Temperature 

 of spring 179° Fahr., similar to No. (4). Quantity of iodine present is very 

 minute, but still can be detected in it as tmconcentrated. 



No. (9). — From AVaipahahi. Forms a pool 50 by 30 yards, the native 

 name of which is Konekeneke. It has a rocky bottom and forms a fine 

 swimming bath. Temperature of water varies from 98° to 120° ; collected 

 1st May, 1873. This is a siliceous water, from which iodine appears to be 

 absent ; at least this element could not be detected in it when concentrated 

 to one-fifth of its original bulk. 



No. (10). — From a hot spring on the Oranui block — Te Hukahuka. 

 Forms a bathing place 15 by 10 feet. A cold water creek and hot springs 

 issue from its enclosing rocks at side and bottom. This resembles the spring 

 water of a slate country except that it is largely charged v.'itli iodine ; col- 

 lected 1st May, 1873. 



From the above tables and schedule it Avill be seen that we have several 

 kinds of mineral waters here, both hot and cold, within no great distance of 

 each other, which is a circumstance likely to be of considerable advantage 

 to many who may desire to use mineral waters for their health. 



It is to be observed that while there is this difference in the constitution 

 of their saline constituents they nearly all contain iodine in sufficient 

 amount to impart to them very decided therapeutic properties. This sub- 

 stance, it may be stated, has been proved to be very efficacious when exter- 

 nally a^Dplied in cases of cutaneous eruptions. 



I should state that so far back as July, in 1871, I partially analyzed a 

 water (contributed by Mr. Murray Gibbs) from Haweraroa, Tarawera 

 district, but whether taken from the same spring as No. (11) was, or from a 

 hot spring at all, I have no information. However, it is essentially an 

 acidic water like No. (11). As received it was opalescent, of a weak reddish- 

 blue colour, and had an odour of sulphuretted hydrogen. This opalescence 

 is due to the presence of hydrated silica, which in a minutely divided or 

 gelatinous form is transfused throughout the liquid. 



The free acid present is principally or wholly the hydi-ochloric. 



11a. Hejjatic Mineral Water. 

 A water collected by Dr. Hector, from Burton's Taipo, is strongly 

 hepatic. Besides the sulphuretted hydrogen which gives it this quality, it 

 contains the other characteristic substances — arsenic and iodine — both 

 however, in small quantity. It is sHghtly acid, but acquu^es a strong 

 and persistent alkaline reaction when evaporated to a small bulk. 



