Description
Martin Singleton
Intended as a subscription ticket for an engraving of Hogarth's ill-fated painting Sigismunda
on the corner of Fleet Street and Whitefriars Street
View of Middle and Inner Temple
Bird's-eye view of Christ's Hospital
Radiometers and otheoscopes Finish:Single Martin SingletonRadiometers 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
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