| RefNo | AP/28/8 |
| Level | File |
| Title | Unpublished paper, 'On magnetic variation' by John George Hartley |
| Creator | Hartley; John George (fl 1846) |
| Date | August 1846 |
| Description | Hartley attempts to produce an estimation of the precise value of the equinoctial or astronomical year.
Followed by a covering letter addressed to P M [Peter Mark] Roget.
Subject: Magnetism
Received 16 October 1846. |
| Extent | 9p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA6616 | Roget; Peter Mark (1779 - 1869); physician and philologist | 1779 - 1869 |