Joseph Priestley's electrical machine T Salmon Plate 47 figure 1 from

Plate 47 figure 1 from the paper 'On the placenta'

' A doormat seller with mats draped over his body stands next to a woman with a bucket and broom

Prime Minister (1783-1801 and 1804-06)

29th June 1963

Joseph Priestley's electrical machine T Salmon Plate 47 figure 1 fromElectrical machine developed by Joseph Priestley to aid his study of electricity. To operate the machine, the handle is turned to make the glass globe rotate and rub against a fixed pad which produces an electrical charge. Priestley included instructions on how to build electrical machines in his book 'A Familiar Introduction to the Study of Electricity', so that others could reproduce his findings. 1768