Description

9th April 1986

Interior view of the Council Chamber in the Guildhall

View showing the Adelphi Theatre in the background

Interior of the British Museum

Electrical discharge mb-code 1238029 9th April 1986Study 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

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