Unequal refrangibility of two differently coloured lights Size:Standard: 14.8 x 10.5cm 'All a-Gog at Guildhall or

'All a-Gog at Guildhall or the civic giants displaying their solid attachments'

An accident in which a spectator was injured in 1925 led to the banning of all speed events on public roads

16th June 1982

Cottage in Hyde Park

Unequal refrangibility of two differently coloured lights Size:Standard: 14.8 x 10.5cm 'All a-Gog at Guildhall orExperiment to demonstrate the unequal refrangibility of two differently coloured lights, an illustration of Newton's first proposition, "Lights which differ in colour differ in refrangibility". From Contributions to solar physics, by J Norman Lockyer (London, 1874). Original: engraving. 1874