Salt paper print (Plate IX) taken from 'The Pencil of Nature' (1844) by William Henry Fox Talbot (1800-1877). Talbot was a mathematician, physicist and philologist but is best known for inventing the negative/positive proces for producing photographs between 1835 and 1839. For the first time, any number of prints could be made from the same shot by transferring the negative image on to special paper to make a positive print - this proces is known as the calotype proces. Talbot's 'The Pencil of Nature', was the first book ever to be illustrated with photographs, and was published in six parts between 1844 and 1846.
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