Licht, Waerme, Strahlen / Magnetismus, Elektrizitaet, Induktion / Daemonen und Geister

Licht, Waerme, Strahlen / Magnetismus, Elektrizitaet, Induktion / Daemonen und Geister

Electrometer
Device for measuring static electric charges, Alessandro Volta, late eighteenth century

Just as in a charged electroscope, the straws in the interior of the device are forced apart because they are loaded with an identical charge. A scale for measuring the distance between the straws indicates the intensity of the charge.

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