| RefNo | MA/256/7 |
| Previous numbers | MA.259 |
| Level | Item |
| Title | Magnetic observations made at Port Louis, Falkland Islands, and St Martin's Cove, Cape Horn, visited by HMS Erebus, by [James Clark Ross?] |
| Creator | Ross; Sir James Clark (1800-1862); polar explorer |
| Date | 5 September-28 November 1842 |
| Description | Tables of absolute intensity readings made using a declination magnetometer no.3, a bifilar magnetometer no.1 and variously numbered deflecting bars. Locations are: Port Louis, East Falkland, 4 September 1842 [pp.1-2]; St. Martin's Cove, Cape Horn, 2 November 1842 [pp.3-4]; and Port Louis, East Falkland, 28 November 1842 [p.5]. |
| Extent | 6p. [p.2 and p.6 blank] |
| Format | Manuscript |
| PhysicalDescription | Ink and pencil on paper |
| Dimensions | 327x408mm. |
| AccessStatus | Open |