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Irwin, Christopher, fl1762 - 1765 (petitioner to the Board of Longitude)

 Person

Found in 4 Collections and/or Records:

 File

Confirmed minutes, 1737 - 1779

 File
Reference Code: GBR/0180/RGO 14/5
Scope and Contents Minutes of Board of Longitude meetings regarding, among other matters, discussions on John Harrison's first marine chronometer (H1); the purchase of new instruments for work on the longitude and latitude of the coasts of Britain; improvements to the reflecting telescope; Tobias Mayer's lunar motion tables; the trial of John Harrison's chronometers; errors in the tables of the satellites; Schutz's machine for finding longitude; Chistopher Irwin's marine chair; the use of lunar observations...
Dates: 1737 - 1779
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Copies of letters sent by Nevil Maskelyne and Lady Clive, 1763 - 1917

 Item
Reference Code: GBR/0180/RGO 218/9/5
Scope and Contents Copies of letters written by Lady Clive to her brother Nevil Maskelyne (three letters dated 1775) and to Edmund Maskelyne (one letter dated 1766); originals are in the volume catalogued at RGO 218/9/1. Also, copies of two letters from Nevil Maskelyne to his brother Edmund (29 Dec. 1763, written from Barbados describing his observatory and experiences) and to Anthony Shepherd (written 15 Oct. 1764 on his return from Barbados, reporting his observations and thanking him for notification of the...
Dates: 1763 - 1917
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Draft letter from Maskelyne to the Board of Longitude, 1763-12-22

 Item
Reference Code: GBR/0180/RGO 4/320/7: 1-4
Scope and Contents

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.

Dates: 1763-12-22
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 File

Log book of voyage to Barbados, 1761 - 1764

 File
Reference Code: GBR/0180/RGO 4/321
Scope and Contents

A log book by Maskelyne of a voyage to Barbados, split into three parts.

Dates: 1761 - 1764
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).

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Barbados 3
Cambridge 1
Longitude 1
South Pacific Ocean 1