Description
opened by King William IV and Queen Adelaide in 1831
'The Reformers' Dinner'
'All a-Gog at Guildhall or the civic giants displaying their solid attachments'
16th June 1982
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
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