Photographs of British Algae. Cyanotype Impressions, Anna Atkins, 1843 - 1853
Every photograph in this book is hand-made. For each one, Atkins placed a specimen of dried algae directly on a sheet of paper, exposed it to sunlight, and rinsed the paper in a tray with water. It is not known how many copies she made, but this will not have exceeded more than 25. In total she made thousands of prints, which is why it took her ten years to complete the publication.