Anna Atkins made Photographs of British Algae from 1843 - the first book illustrated with photographs. Each specimen was laid on paper treated with iron salts and left in the sun, so the white shape is the algae’s own shadow.
Anna Atkins made Photographs of British Algae from 1843 - the first book illustrated with photographs. Each specimen was laid on paper treated with iron salts and left in the sun, so the white shape is the algae’s own shadow.