1. C.192.c.1, 6(298) Reference (shelfmark): C.192.c.1, 6(298) Title: Conferva purpurascens. Photographer: Atkins, Anna Scope & Content: Genre: Scientific Photography Cyanotype negative photogram of algae specimen, on paper watermarked, 'J Whatman Turkey Mill 1849,' and with British Museum yellow datestamp for 11 Oct 1851 on reverse. Collection Area: Printed Collections Languages: Not applicable Date Range: c 1851 Extent: 1 item