| RefNo | AP/44/4/2 |
| Level | Item |
| Title | Unpublished diagrams, the Earth's magnetic field by Henry Hennessy |
| Date | 1862 |
| Description | Two small diagrams showing a series of concentric circles, illustrating the Earth's magnetic field.
Subject: Magnetism |
| Extent | 2p |
| Format | Diagram |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA5993 | Hennessy; Henry (1826 - 1901) | 1826 - 1901 |