Cyanotypes of Algae, 1843

‘Photographs of British Algae: Cyanotype Impressions’ by Anna Atkins (1799-1871) Part 1 of Fox Talbot’s own copy, sewn in original blue wrapper. Atkins published a collection of cyanotype photograms of algae, in installments over ten years from 1843 to 1853. | src Science and Media Museum