Electrical discharge Size:Standard: 6 x 4in Saturday 9th December 1967

Saturday 9th December 1967

'Waterloo Bridge and St Paul's from the Embankment'

Galvani's experiments on the effect of electricity on dissected animals in the 1780s and 1790s

This cartoon shows John Bright as Harlequin and Lord Russell on the floor tripping the unwary Disraeli as he comes through the door with the weighty Reform Bill on his shoulder

Electrical discharge Size:Standard: 6 x 4in Saturday 9th December 1967Study 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