| RefNo | AP/52/2/4 |
| Level | Item |
| Title | Unpublished figures, 'Johnson's self registering deep sea metallic thermometer' by John Edward Davis |
| Creator | Davis; John Edward (1815-1877); British hydrographer; Royal Navy officer |
| Date | 1869 |
| Description | Three figures in black ink, labelled figures 1-3, showing Johnson's self-registering deep sea metallic thermometer with its parts labelled.
Subject: Scientific apparatus and equipment |
| Extent | 1p |
| Format | Drawing |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |