Used at the laboratory of the first Gymnasium of Athens, Plaka.

This is an early device used to experiment with the properties of a condenser (now known as a capacitor.) The Aepinus condenser was the first condenser developed after the Leyden jar and was used to demonstrate conductive and inductive electricity. The device is constructed so that the space between the plates can be adjusted and the glass dielectric (insulating plate between them) can be removed or replaced with other materials.
(http://www.sparkmuseum.com)