Fig. 5: Alessandro Volta’s experiments with the condensatore
“Take between the fingers that extremity C of the plate which is of copper, and touch with the zinc extremity the upper plate of the condenser, which is also of copper. Fig. 5. When we put an end to this contact, and raise up the plate which was applied to the condenser, it does not acquire any electricity, although the inferior plate communicates with the ground (p. 431).