ライデン瓶
The high voltage static charge on top of the Leyden jar storage battery was applied to a patient as he or she sat on a chair or stool atop a special platform. The four glass legs of the chair insulated the platform from the ground. The operator channeled the stored charge from the Leyden jar to the patient using metal attachments that were connected to the patient. The electrical charge produced a shock that was described to have been similar to "touching a doorknob after walking across carpet in dry weather".