Fig. 88.
Fig. 89.
When it is desired to connect separate bells to ring
in other parts of the building, the quickest way is to take a branch wire out of the nearest battery wire (the wire coming from the carbon pole), and carry it to the push or pull, from thence to the bell, and from the bell back to the zinc of the battery.
§ 72. We should advise the fixer always to draw out a little sketch of the arrangement he intends to adopt in carrying out any plan, as any means of saving useless lengths of wire, etc., will then easily be seen. In doing this, instead of making full sketches of batteries, he may use the conventional signs ▍▏ for each cell of the battery, the thick stroke meaning the carbon, the thin one the zinc. Pushes may be represented by (·), earth-plates by [E] and pulls, switches, &c., as shown in the annexed cut, [Fig. 90], which illustrates a mode of connecting up a lodge with a house, continuous bells being used, in such a way that the lodge bell can be made to ring from the lodge pull, the house bell ringing or not, according to the way the switch (shown at top left-hand