Electrical discharge watcher 'Goods forwarded by railway'

'Goods forwarded by railway'

View with figures gathered around listening to a speaker

Troops in formation can also be seen behind

Sandy Denny

Electrical discharge watcher 'Goods forwarded by railway'Study of patterns 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