1. C.192.c.1, 7(364) Reference (shelfmark): C.192.c.1, 7(364) Title: Calothrix Cresswelliæ. Photographer: Atkins, Anna Scope & Content: Genre: Scientific Photography Cyanotype negative photogram of two algae specimens, on unwatermarked paper, but 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