Photograph by William Henry Fox Talbot (1800-1877), English mathematician, physicist, philologist and pioneer of photography. Talbot invented the first negative/positive proces for producing photographs between 1835 and 1839. This meant that for the first time any number of prints could be made from the same shot by transferring the negative image onto special paper to make a positive print. Talbot's proces for achieving this is known as the calotype proces. In 1844, Talbot published 'The Pencil of Nature', which was the first book ever to be illustrated with photographs.
© National Museum of Science & Media / Science & Society Picture Library