Electrical discharge Size:L: 80 x 60cm Laurie Cunningham poses for the

Laurie Cunningham poses for the camera with a flower Madrid Spain

Attempts had been made at the beginning of the 1880s but had come to nothing

Interior of Coopers' Hall with representation of the drawing of the lottery

Map of the City of London

Half length portrait of Sir Archibald Geikie

Electrical discharge Size:L: 80 x 60cm Laurie Cunningham poses for theStudy 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