Silver wire explosion pattern mb-width 2252 Monument to John Holland

Monument to John Holland

Vignette of derelict ground on which the Old General Post Office was erected

'Buy my Dutch Biskets'

with crowds watching ceremonial barges pass beneath the bridge

Inscribed in pencil verso 'Professor Daubeny D

Silver wire explosion pattern mb-width 2252 Monument to John HollandThree figures of effects produced by the explosion of silver wire positioned over a sheet of paper or glass when subjected to a high voltage electrical current. This was provided by the electrostatic generator and associated machinery designed by John Cuthbertson (bap. 1743 d. 1821) for Martin van Marum and installed at Teyler's Museum at Haarlem in the Netherlands. The results of these experiments are considered to be an early milestone in high