Carte de visite photograph by Webster of John Ralfs (1807-1880). Ralfs was trained as a surgeon, but gave up his career in 1837 to concentrate on botany. He was President of the Penzance Natural History and Antiquarian Society 1883-84, and published 'British Phenogamous Plants and Ferns' (1839) and 'The British Desmidieae' (1848). Dimensions: 100mm x 60mm.
© Science Museum / Science & Society Picture Library