| RefNo | EL/O1/79 | 
| Level | Item | 
| Title | Letter, from Henry Oldenburg to [Pierre] Petit, dated at London | 
| Creator | Oldenburg; Henry (1619-1677); German natural philosopher in England; scientific correspondent | 
| Date | 20 October 1668 | 
| Description | States that he is sending a letter from a man who claims to have calculated the westward variation of the compass for several successive years | 
| Language | French | 
| Extent | 1p | 
| Format | Manuscript | 
| Place origin | London, England | 
| Origin coordinates | 51.50853, -0.12574 | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| RelatedMaterial | Transcribed and translated in 'The correspondence of Henry Oldenburg', ed and trans by A Rupert Hall & Marie Boas Hall, vol 5, p 93 | 
| URLDescription | Also available on Early Modern Letters Online | 
| URL | http://emlo.bodleian.ox.ac.uk/profile/work/04038947-a2f9-426a-8af0-00c7e9261ca5 | 
Fellows associated with this archive
| Code | PersonName | Dates | 
| NA4518 | Petit; Pierre (? 1594 - 1677); engineer and astronomer | ? 1594 - 1677 | 
| NA8001 | Oldenburg; Henry (c 1619 - 1677); scientific correspondent | c 1619 - 1677 |