Los Angeles herald., 1908-09-13
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anywhere, be sure TO scrape the covering of
both parts of the double wire.
Ia HIKING the wires, YOU must be cure not
70 let those coming from opposite ends Of the
battery remember they are both contained
IN the double wire') touch anywhere.
~ you do this, there will be Short cir
CUT That IS to say, the electricity will run
round that Joint and never reach the lamp
little ingenuity will show how to fix the
ends OF the wires and the lamps, which are,
OF course, fastened to the wires, one platinum
wire IN contact with each In my own ar
IIangeInent, have fixed candle shades over
them, which look exceedingly well. and add
to their light by reflection.
Our electrician will no doubt feel unbound
ed satisfaction when the lamps are up and he
Is able to show his friends how. by turning
the switch to one side, he can light up one
light another ROOM
For the sake of simplicity, [ have only de-
scrlped the arrangement of two-way switch.
There Is, however, theoretically, no limit to
tne number OF rooms that can be lighted up
by one switch, but when we come to emplov
very large number of lights, an extra switch
for every three is advisable.
In my own practice, / have fitted a lamp
to the top of the door-frame of an inner hall
door, the switch being in the hall. At night
the inside hall is lighted by lamp. but this
leaves the space between the doors dark.
The advantage of the electric lamp is now
evident, since, when the door-bel rings. one
can turn, the light on as one goes through the
hall. and this instantly lights up the outside
door. 1t also throws good LIGHT ON the
ground outside when leaving the house: but
II one is out for some time, the lamp must be
turned out from inside the house until one
returns.
The battery have mentioned is the one
which, on the whole, is, should think, very
well suited for an amateur. If the light Il
only wanted for about ten minutes at long in
teryals. the Leclanche battery can be used.
Inns is generally used for ringing bells, and
as it is rather weaker battery, each cell Civ
will have to be employed and it will run
down much quicker than the other-i. e.,
the lamp will grow dim sooner when left
turned on.
1t has, however, the advantage that the
chemical used to charge it is cheap, and it
i, would require recharging much more seldom
| than the other battery-about once a year or
at any rate nine months, if only used for a
| little while at time
Sever, of these will light six-volt lamp.
1t is, 1 think, unnecessary to give a de-
scription OF this battery, as the cells are much
more easily obtained than the material for
making the first, and cost as little to buy
ready made as to construct for oneself
| l think | have said enough now to enable
my readers to fit up small light wherever
| they may want one.
! viii conclude with hint or two:
1; Keep the zinc amalgamated q. e.. coated
with mercury in the first battery by putting
very. small quantity of mercury at the bot.
tom, OF each porous pot whenever the battery
is charged.
2. Take particular care that there is no
short circuit e., that the wires do not
touch each other till they arrive at the lamp,
or the electricity will go back the shortest
way
| 3. Do not use a cracked porous pot This
prevents the light from lasting as long as it
ought when turned on one cracked pot in one
jar will spoil the whole. battery.
4. Be very careful when making up solu-
ton with strong sulphuric acid Unless You
are disposed to be cautious you had better
use the first battery described, as the strong
sulphuric acid is very dangerous stuff to med
die with. Have bottle Of strong ammonia
ready, and if You spill any of the acid, pour
some on the top of it.
3. Instead Of the zines bought from the
shops ready cast, you can use ordinary sheet
zinc cut into slips the right size, and amalga-
mated. They will cost much less, but win not
last so long: thick wire must connect each
strip with the carbon in the next pot