Description
The original Blackfriars Bridge
'One of the afflicting occurrences in life in London
Herefordshire 9th May 1939
St Barnabas Chapel
Electrical discharge Earl Cranbrook The original Blackfriars BridgeStudy 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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