| Reference number | LBO/25/62 |
| Alternative reference number | LBO/25/224 |
| Level | File |
| Title | Copy letter from John Martyn, Chelsea, to John Machin |
| Date | 23 March 1739 |
| Description | ' A Letter from Mr Professor Martyn to Mr Machin containing his Observations of the uncommon Lights seen in the Sky, on on 18 March 1738/1739 at Night. '
Read to the Royal Society on 29 March 1739 |
| Extent | 3p |
| Format | Manuscript |
| Access status | Open |