| Reference number | RBO/5/20 |
| Level | Item |
| Title | 'An Observation Of the variation of the Needle made by Mr Flamsteed' |
| Date | 1680 |
| Description | Observation made on 25 February 1680 at Greenwich Observatory
Figure in text showing a windmill at Bromley and Eltham steeple as the fixed points
Read to the Royal Society on 4 March 1680 |
| Language | English |
| Extent | 1 side |
| Format | Manuscript |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA8219 | Flamsteed; John (1646 - 1719); astronomer | 1646 - 1719 |