| RefNo | EL/R1/77 |
| Level | Item |
| Title | Account of a system of the celestial sphere followed by a method for finding longitude upon sea by P.I. Roquette [Rocquette], watch maker to her imperial Russian majesty, dated at St Petersbourgh [St Petersburg] |
| Creator | Roquette; P. I. (fl. 1732); watchmaker to Anna Ioannovna, Empress of Russia |
| Date | 24 June 1732 |
| Description | Note reads: 'Not to be copied being printed' |
| Language | English |
| Extent | 14p |
| Format | Manuscript |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedRecord | CLP/22ii/59 |
| URLDescription | Also available on Early Modern Letters Online |