Electrical discharge mb-code 1619161 View of Holborn Viaduct under

View of Holborn Viaduct under construction

Inscribed in pencil lower left '1804'

The bikers all lean into the bend as they take the corner

As a result of dock closures

Electrical discharge mb-code 1619161 View of Holborn Viaduct underPatterns 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