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Science Museum Group
© The Board of Trustees of the Science Museum, London
Science Museum Group
© The Board of Trustees of the Science Museum, London
Notebook Q.
Notebook Q. Page 39, which includes entries for September 20-22 1840 where Talbot sets out the basis for the Calotype process. Realising the significance of his discover, he cut out the name of the chemical Galic acid, just in case the album should fall into the wrong hands
