Esperimenti spettacolari con scintille e scariche elettriche

Amazing experiments, performed with the first electrostatic machines, showed sparks and electric discharges emanating from charged bodies. The use of more efficient equipment also allowed researchers to investigate the properties of electric discharges, even thanks to specially designed devices, such as the paper and the glass perforators.
These devices, in addition to research purposes, were used throughout the nineteenth century for teaching, and precisely to actually show the properties of the electric discharge.