| RefNo | MM/11/140 |
| Level | Item |
| Title | Letter from Martyn Roberts, St James's Street, to Sir James Clark Ross |
| Date | 3 July 1839 |
| Description | Describing his method for determining terrestial magnetic intensity ("my plan is to use an apparatus which is idependent of any magnetism communicated artificially to its needle"). |
| Extent | 4 sides |
| Format | Manuscript |
| AccessStatus | Open |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA7948 | Ross; Sir; James Clark (1800 - 1862) | 1800 - 1862 |