✨ Technical Instructions
2174
THE NEW ZEALAND GAZETTE.
[No. 80
82
pint of the liquid, and replace it by that quantity of fresh
sulphuric acid and water mixed as above, and in the inner cell
(the porous pot) renew the fresh water altogether. The local
thus attended to will stand good for one month at the very least,
when it must be taken down and a new one put in its place.
Officers in Charge must be careful to see that the
local is regularly attended to at the close of each week.
The quicksilver in the old porous cell is to be well washed
and saved, in order that it may be retorted at some future
time.
THE LECLANCHE BATTERY.
Charging Battery.
376. The porous pot contains a plate of carbon surrounded
by peroxide of manganese. The outer or glass jar is simply
filled with water, and sal ammoniac added. The modus operandi
is as follows: First fill the porous pot with plain water at one
of the little holes like funnels in the pitch top; and when
water is seen coming out of the other little hole the pot is full.
It sometimes accidentally happens in manufacture that the pitch
fills up one of the little holes. This can be remedied by push-
ing any sharp pointed instrument, such as a nail, down the
hole. After filling the porous pot, place it in the glass jar,
and fill the glass jar around the pot for 1 in. from the bottom
with the powdered sal ammoniac. Then fill up the glass jar
within 2½ in. of the top with water free from iron. The zinc
must be placed in the glass jar when filling with water.
The cell remains charged about six or eight months. It is
only necessary in the interval to add occasionally, as the
deterioration in the signals shows it to be necessary, about a
tablespoonful of sal ammoniac to the liquid in the glass jar
outside the porous pot, and to keep the liquid in the glass jar
up to the level of 2½ in. below the shoulder of the jar.
377. TELEGRAPH ALPHABET AND CODE OF SIGNALS.
ALPHABET.
A - —
B — - - -
C — - — -
D — - -
E -
F - - — -
G — - -
H - - - -
I - -
J - — — —
K — - —
L - — - -
M — —
N — -
O — — —
P — - - —
Q — — - —
R - — -
S - - -
T —
U — — -
V - - - —
W - — —
X — - - —
Y — - — —
Z — — - -
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NZ Gazette 1905, No 80
✨ LLM interpretation of page content
🏗️
Description of Bichromate Battery Construction
(continued from previous page)
🏗️ Infrastructure & Public WorksBichromate battery, porous pot, zinc plate, carbon plate, sulphuric acid, bichromate of potash, mercury, chrome-alum, battery maintenance, electrical cells
🏗️ Description of Leclanché Battery Construction and Maintenance
🏗️ Infrastructure & Public WorksLeclanché battery, porous pot, carbon plate, peroxide of manganese, sal ammoniac, zinc, charging battery, telegraph equipment
🚂 Telegraph Alphabet and Code of Signals
🚂 Transport & CommunicationsTelegraph alphabet, Morse code, signal code, A-Z signals, telegraphic communication