Electrical discharge Size:L: 80 x 60cm The building is open to

The building is open to the sky and the ground is covered with rubble

Half length portrait of Sir Archibald Geikie

View of Somerset House on the Strand and the Adelphi beyond

They are driven into one of ten bays are parked automatically by means of two lifts

Seated portrait of a man in wig and fur-trimmed gown

Electrical discharge Size:L: 80 x 60cm The building is open toStudy 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