| Reference number | MM/10/107 |
| Level | Item |
| Title | List by Nevil Maskelyne of instruments required for observing the Transit of Venus, and their cost |
| Date | 1760 |
| Description | List of instruments required with an estimate of their cost. In Nevil Maskelyne's hand - as follows:
3 Reflecting Telescopes of two feet, two for the observation for the Transit of Venus at the Island of St Helena, and one for the corresponding observation to be made at the Royal Observatory. Cost £105
2 micrometers of Mr Dolland's invention to be fitted to two of the Reflecting Telescopes for the purpose of the two corresponding observations at St Helena and Royal Observatory. Cost £30
A clock with a Pendulum adjusted so as to obviate the variable effects of heat and cold, for the Observations at the Island of St Helena. Cost £20
An 18 inch Quadrant, to rectify the Clock for the observations at St Helena. Cost £30
A 16 foot Astronomical Sector, with a compound object glass of Mr Dolland's invention fr the observation of the annual parallax of Sirius, at the Island of St Helena. Cost £100 |
| Extent | 1 sheet |
| Format | Manuscript |
| Physical description | Paper, ink |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA5553 | Maskelyne; Nevil (1732 - 1811) | 1732 - 1811 |