| RefNo | RBO/21/64 |
| AltRefNo | RBO.21.364 |
| Level | Item |
| Title | 'The Description and Use of an Apparatus added as an Improvement to Davis's Quadrant, consisting of a Mercurial level...' by Charles Leigh |
| Date | 1739 |
| Description | '... for taking the Co-altitude of the Sun or Star at Sea, without the usual assistance of the sensible Horizon, which frequently is obscured'
Engraved figure from 'Philosophical Transactions' attached
Read to the Royal Society on 28 June 1739 |
| Language | English |
| Extent | 11 sides |
| Format | Manuscript |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedMaterial | Printed in 'Philosophical Transactions', vol 40, no 451, p 417 |
| RelatedRecord | CLP/8ii/58 |
| RBO/21/1 |