Found in 5 Collections and/or Records:
Celestial observations made on board His Majesty's ship the Princess Louisa, under Admiral Tyrell, 1763-09-20 - 1763-11-08
The observations include mathematical equations and methods for finding the inclination of the ecliptic to the horizon [RGO 4/321: 1v-2v]; details of how the observations were taken and with what instruments [RGO 4/321: 3r]; and a log of the observations covering the period 20 September-18 October 1763 [RGO 4/321: 3r-7r]. For a log of the observations of 19 October-8 November, see [RGO 4/321: 38v-40v].
The undated draft letter concerns the eclipses of Jupiter's satellites and the deduction of longitude from observations made on board HMS Princess Louisa during a voyage to Barbados. Maskelyne mentions his inability to make these observations from either of Christopher Irwin's marine chairs, which he had been asked by the Commissioners of the Board of Longitude to use and give an opinion on. On the reverse are observations made by Maskelyne whilst in Barbados.
Journal of a voyage from England to Barbados in his Majesty's ship Princess Louisa, under Captain Norwood and Admiral Tyrell, 1761 - 1764
Observations for the longitude made on board the Princess Louisa, 2 November 1763, 1763-09 - 1763-11
These include observations and computations for the longitude made on or before 2 November, a summary with comments on errors and alterations to instruments, and bearings for landmarks in Barbados (loosely inserted in the volume) [RGO 4/321: 54].