Fig. 191
The chandelier over the dining-room table had a pendant push button A ([Fig. 191]), with which the regular electric lights could be turned on and off. This I had removed and extended the wires down upon the table. It was only necessary to connect these to the binding posts d and e of the relay, and the next wave from the spark coil lighted the chandelier.
The flexible wires underneath the dining-room table with which the maid is usually summoned from the kitchen were next extended up and connected with d and e of the relay, and the maid was called in by an ether wave. She brought with her a tray in the centre of which stood an earthenware cup, such as is used for baking custard. This had been filled with a mixture of granulated sugar and powdered potassium chlorate. Four dry battery cells stood around this upon the tray connected in series ([Fig. 192]). A very small iron wire connecting two of these cells dipped into the sugar mixture. Two wires from the battery were connected to d and e of the relay. At the proper signal an ether wave was sent out by the spark coil. The coherer closed the relay and the relay acted as a push button to close the circuit of the four cells upon the tray. The fine wire dipping into the sugar and potassium chlorate got red hot. This caused the mixture to flash up and burn in most beautiful coloured flames. ([Fig. 193]).
Fig. 192
Fig. 193