Electrical discharge mb-artistname Wenceslaus Hollar grapes and a chestnut

grapes and a chestnut

Francia sculp

The pedestrians are in distress

inscribed 'L'observatoire royal commencÚ en 1667

was an exciting performer

Electrical discharge mb-artistname Wenceslaus Hollar grapes and a chestnutPatterns produced by electrical discharges on surfaces revealed by dusting with powdered red lead and sulphur. Sometimes termed 'Lichtenberg figures'. These experiments were conducted at Cragside in Northumberland, England, using a Wimshurst machine (electrostatic generator) and two 10 gallon Leiden jars. Current was conveyed to two rod conductors with a spark gap at which coated wires discs or plates were positioned. Lord Armstrong exhibited figures