Unequal refrangibility of two differently coloured lights Size:Standard: 14.8 x 10.5cm opened by King William IV

opened by King William IV and Queen Adelaide in 1831

with boats and barges on the Thames

16th June 1982

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

'The Reformers' Dinner'

Unequal refrangibility of two differently coloured lights Size:Standard: 14.8 x 10.5cm opened by King William IVExperiment 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