| RefNo | AP/34/10/12 |
| Level | Item |
| Title | Unpublished figure, crystals and polarised light by William Bird Herapath |
| Creator | Herapath; William Bird (1820-1868); English surgeon; chemist |
| Date | 19 January 1854 |
| Description | A figure showing the appearance of crystals depending on the direction of polarised light.
Subject: Chemistry / Optics |
| Extent | 1p |
| Format | Drawing |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |