Stand size dimensions: 110 x 70mm.
Clearly shows that, when the Leyden Jar is charged, the electrostatic charge resides in the dielectric.
Polythene has been chosen as the dielectric as it is almost unaffected by humidity therefore retaining it’s charge.
Once charged he internal and external cups can be separated leaving the dielectric holding the charge.
The inner cup has a vertical rod attached to it topped with a sphere for charging.