The spiral glass electrode is one of the rarer electrodes in a modern kit. A couple of manufacturers make them today but you rarely see them included in a modern kit.
Originally designed in the early 1900s, this electrode was promoted for use on the heart. It was reasoned that electrical therapy on the heart improved function and eliminated heart ailments.
Of course, we know better now. The spiral electrode is similar to the mushroom electrode found in most kits. The sensation it produces is sharper but cooler than a mushroom. The spirals effectively produce about half the surface area of the mushroom in the same space.
You can find spiral electrodes in various colors, depending on the gas and vacuum in the electrode.
If you want to attract a crowd at your next public violet wand demo or scene, the spiral electrode is unique enough to accomplish it.
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