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Colours observed within layers of mica (figures a-f) with concentric circles of sixteen colours based upon Isaac Newton's observation of colours produced at the contact of two telescope object-glasses (figure g)
Many believed that this later helped keep Nepal and its Ghurkha regiments faithful to the British during the Indian Mutiny which erupted in 1857
and the circumstance of its not having the least appearance of a comb on the head
John Bull stands by a board displaying bills for volunteers
A Merry Christmas Postcard with a Patriotic Spaniel Product:Greetings card Colours observed within layers of
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