442 Transactions.— Chemistry. 
to.generate sulphuretted hydrogen from aqueous solutions of the sulphates 
when in contact with them—a circumstance I note here especially for the 
guidance of collectors of mineral waters for analysis. 
Salts Salts 
soluble in gece in 
water acids, 
dug desi: aay Total Loss by A > 
No.| Princi- rinci- Silica. Physical character. Reaction. 
pally pally of Salts. | ignition. 
alkaline | sulphate 
chlorides, of lime. 
1 5:28 “74 1:86 13:88 39-47 | pale yellow, clear | faintly acid. 
2 13:88 4:31 9:25 27-44 8:08 | colourless, clear js 
3 3:85 1:69 2:9 1:54 » = z 
4 | 138-07 4:21 10:03 | 152:31 is 
5 163 | 18:51 84-86 | 12:97 | yello wW, turbid e 
6 9:24 | 15775 33:12 1:52 colourless, clear slightly acid. 
7 4:12 9:84 | 28:51 56:47 3:24 
8| 127:62 9:62 6:25 | 143:49 4-61 eutral. 
$08 | 1233 | 21°57 4:65 | pale yellow ' HAE acid. 
10 3:09 4:62 6:10 13:81 3:08 | eolourless, turbid 
11 js i. 9-02 99:95 a 3i clear very & 
12 16°75 | 200-73 Pa vi faintly dL 
In the following schedule the localities of these waters are stated, together 
with certain interesting partieulars respecting them which have been fur- 
nished by Dr. Spencer. The general character of each, as deduced from 
the foregoing table, is also given :— 
No. (1).—Otumuheka Spring; collected 1st March, 1878; a siliceous 
water, more than half its solid matter being silica; the remaining portion 
is principally chloride of sodium with a notable quantity of iodides. 
No. (2).—From same locality ; collected same time as above, and is also 
a siliceous water, but although it contains a larger proportion of alkaline 
chlorides than this water, it gives but slight indications of iodine. 
No. (8).—From the Otumuheka Stream. This stream has a temperature 
of 78° Fahr., and forms bathing places at Lake Taupo. It is a very similar 
kind of water to No. (1), and, like it, is rich in iodine. 
No. (4).—From the Ruahine Hot Springs, on ground belonging to Mr. 
Locke. These springs have a temperature as high as 190? Fahr. They 
are eminently saline, the principal constituent being chloride of sodium, 
and appear by comparative tests to be the richest in iodine of any of this 
series of waters; collected 1st May, 1878. 
No. (5).—From the baths of Orakeikorako. As received this was very 
turbid and high coloured. It did not lose its turbidity when allowed to be 
at rest for a long time. It is highly charged with saline matters, princi- 
pally alkaline chlorides, and it gives a very distinct reaction of iodine. 
The organic matter is high in this water. 
No. (6).—From a bath named after Mr. McMurray. Is a siliceous 
water, comparatively poor in chlorides, but rich in iodides, 
ie ae A fake a REN EUR RE GA Er PES ia S AEEA EEUU T EENAA oD du 
