Electrical discharge Earl Cranbrook Front view of the Royal

Front view of the Royal Brunswick Theatre

Herefordshire 9th May 1939

The original Blackfriars Bridge

In addition to the major crossing of Farringdon Street

Electrical discharge Earl Cranbrook Front view of the RoyalStudy 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