Lighting an Incandescent Lamp with an Induction Coil
Geissler Tube
An incandescent lamp of low candlepower may be illuminated by connecting to an induction coil in the manner shown in the sketch. One wire is connected to the metal cap of the lamp and the other wire is fastened to the glass tip. If the apparatus is then placed in the dark and the current turned on, a peculiar phosphorescent glow will fill the whole interior of the lamp. The induction coil used for this purpose should give a spark about 1/2 in. long or more.
Contributed by Joseph B. Bell, Brooklyn.
How to Make a Jump-Spark Coil
