The leyden-jar should be charged when the instrument is used.
He had felt the power of a leyden-jar discharge, and through it had nearly lost his life.
These plates are in connection with the inner coating of a leyden-jar, and are termed the attracting plates.
The whole instrument is enclosed in a metal cage, to protect the glass leyden-jar and the delicate needle.
1755, phial used for accumulating and storing static electricity, from Leyden (modern Leiden), city in Holland; so called because it was first described (in 1746) by physicist Pieter van Musschenbroek of Leyden (1692-1761). The place name is said to be from Germanic *leitha- "canal."
|Leyden jar |
An early device for storing electric charge that uses the same principle as a modern capacitor. It consists of a glass jar with conductive metal foil covering its inner and outer surfaces, with the glass insulating these surfaces from each other. The inner surface is charged (by an external source) through an electrode penetrating the top of the jar; the inner and outer foil layers can then hold an equal and opposite charge.