1. C.192.c.1, 7(348) Reference (shelfmark): C.192.c.1, 7(348) Title: Zygnema deciminum. Photographer: Atkins, Anna Scope & Content: Genre: Scientific Photography Cyanotype negative photogram of algae specimens, on paper watermarked, 'J Whatman Turkey Mill 1851,' and with British Museum yellow datestamp for 12 Nov 1853 on reverse. Collection Area: Printed Collections Languages: Not applicable Date Range: c 1853 Extent: 1 item