Description
'All a-Gog at Guildhall or the civic giants displaying their solid attachments'
with boats and barges on the Thames
In this posthumous portrait
View of Westminster
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
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