| RefNo | MA/251/16 |
| Previous numbers | MA.251 |
| Level | Item |
| Title | Magnetic observations at the Madras Magnetic Observatory, India, by Samuel Owen Edgar Ludlow |
| Creator | Ludlow; Samuel Owen Edgar (d.1888); British army officer in India |
| Date | 31 March 1842 |
| Description | Calculations of horizontal intensity at Madras [Chennai], using magnets X and no.8.
Signed [p.1 and 2]: 'S.O.E. Ludlow Supt Magl Observatory'. |
| Extent | 2p. |
| Format | Manuscript |
| PhysicalDescription | Ink on paper. |
| AccessStatus | Open |