Found in 9 Collections and/or Records:
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
Letter containing observations of the stars and Jupiter's satellites to determine the longitude of Barbados.
A log book by Maskelyne of a voyage to Barbados, split into three parts.
A record of observations at sea with calculations and notes, including notes on observations of Jupiter's satellites and on his chronometers during his voyage to Barbados [to test John Harrison's chronometer H4].
Prose notes describing the workings of the time-keeper, with comments on making adjustments to it and on its accuracy.