Radiometers and otheoscopes Finish:Single He is dressed in grey

He is dressed in grey breeches

23rd September 1962

on the corner of Fleet Street and Whitefriars Street

Intended as a subscription ticket for an engraving of Hogarth's ill-fated painting Sigismunda

on his way to deliver a resolution of support to Burdett

Radiometers and otheoscopes Finish:Single He is dressed in greyRadiometers and otheoscopes, instruments designed for measuring the mechanical effect of radiant energy. Mounted in a partial vacuum, the central rotor spins when the vanes are exposed to light. Chemist William Crookes (1832 1919) initially believed the vanes with black surfaces were pushed around by pressure from light radiation. This was incorrect and other theories were put forward. It was not until 1879 that Osborne Reynolds suggested the correct