| RefNo | AP/34/10/14 | 
| Level | Item | 
| Title | Unpublished figure, crystal structure by William Bird Herapath | 
| Creator | Herapath; William Bird (1820-1868); English surgeon; chemist | 
| Date | 19 January 1854 | 
| Description | A figure in black ink, labelled figure 22, showing a crystal structure labelled with angles. 
 Subject: Chemistry / Optics
 | 
| Extent | 1p | 
| Format | Drawing | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open |