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Sir Charles Wheatstone (1802-1875): The Playfair Cipher

Sir Charles Wheatstone (1802-1875) was the Professor of Experimental Philosophy at Kings College London and was renowned for his many inventions, including the English Concertina, an early electrical telegraph, the stereoscope, and a ‘Magic Harp’ that later inspired Alexander Graham... Continue Reading →

India, Pakistan and Afghanistan – Photographs of the 1940s

The recent geo-political upheaval in Europe led us to re-examine a remarkable photographic collection in the IET Archives which spans another place and time of great political uncertainty, namely India in the mid to late 1940s. The collection, comprising 15... Continue Reading →

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