Numb. 40.

473

THE
NEW ZEALAND GAZETTE.
Published by Authority.

WELLINGTON, THURSDAY, MAY 3, 1877.

Fixing Sittings of District Court of Otago Gold
Fields.

NORMANBY, Governor.

IN pursuance and exercise of the power and
authority in this behalf enabling me, I, George
Augustus Constantine, Marquis of Normanby, the
Governor of the Colony of New Zealand, do hereby
fix and appoint that a sitting of the District Court
of the Otago Gold Fields for Civil and Criminal
business shall be held as follows:--

In the Resident Magistrate's Court House at
Lawrence, on the fourth day of May next.

As witness the hand of His Excellency the
Governor, this twenty-fifth day of April,
one thousand eight hundred and seventy-
seven.

CHARLES C. BOWEN.

Report on Analysis of Water from Rotorua District.

Colonial Secretary's Office,
Wellington, 30th April, 1877.

THE following report of the result of the analysis
of samples of water from the Hot Springs,
Rotorua District, is published for general informa-
tion.

DANIEL POLLEN.

Colonial Museum of New Zealand,
Wellington, 19th April, 1877.

SIR, I have the honor to forward a preliminary
report of the results of the analysis of the fifteen
samples of water from the Hot Springs of the Rotorua
District forwarded for examination at the suggestion
of His Excellency the Governor.

A further report will be made on the completion of
the investigations still in progress.

I have, &c.,
JAMES HECTOR.
The Hon. the Colonial Secretary.

Report on 15 Samples of Water from the Hot
Springs of the Rotorua District.

No. 1—Is the water from Te Tarata, or the spring
which forms the great white terrace of Rotomahana.
This is a true geyser, having a large crater-shaped
basin 90 feet in diameter, the lip of which is about 70
feet above the level of the lake.

This basin is emptied by an explosive effort, which
throws the water to a height of 40 feet, emptying the
basin, which again fills up rapidly. The water trickles
over the ledges of the terrace, depositing fresh layers
of silicious sinter as it cools in its progress to the
lake. The water in the basin has a deep azure blue
colour, and a temperature of 210° Fah.

As received at the laboratory, the water was faintly
turbid, but without any deposit, colourless, and having
an alkaline reaction.

Analysis :
Silicate of soda ... ... ... 68.48
Mono-silicate of lime ... ... 1.62
" magnesia ... ... 53
" iron ... ... 51
Sulphate of potash ... ... 7.84
" soda ... ... 2.87
Chloride of potassium ... ... 62.61
" sodium ... ...
Phosphate of alumina ... ... traces
Lithia ... ... ...
144.46

All but the soda are mono-silicates, the little
excess of silica, 7.66, is included in the soda silicate.

No. 2.—From Ta-pui Te Koutu, three-quarters of
a mile from Ohinemutu, a large pool, 60 to 80 feet
deep. The usual temperature of the water in this
pool is from 90° to 100°, with westerly or southerly
winds; but if the wind changes to N. or E., the water
rises 4 feet in level, and the temperature increases to
180°, with a strong outflow. Thick masses of slimy
confervoid plants line the bottom of the pool. As
received, the water was clear and colourless, with an
alkaline reaction.

Analysis :
Silicate of soda ... ... 32.12
Mono-silicate of lime ... ... 1.62
" magnesia ... ... 40
" iron ... ... 67
Sulphate of soda ... ... 7.06
Chloride of potassium ... ... 97
" sodium ... ... 29.94
Phosphate of alumina ... ... traces
72.78

Excess of silica over what is required to pass these bases
as mono-silicates is 5.55.

No. 3.—From Turi-Kore or Whakarewarewa, $2\frac{1}{2}$
miles from Ohinemutu. The sample was taken from
a waterfall which drains from a large pond 300 yards
long, the reservoir of a number of boiling springs
that are in continual activity. The temperature of
this fall is from 96° to 120°. The water is of a dirty

ERRATUM.—In New Zealand Gazette dated 19th April, 1877, on page 426, for "Hadfield, John Alexander," read "Hadfield,
Alexander John."