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Harrison, John, 1693 - 1776 (horologist)

 Person

Found in 4 Collections and/or Records:

 File

Astronomical observations made at the Island of Barbados, 1763 - 1764

Reference Code: GBR/0180/RGO 4/323
Scope and Contents The log covers the period from 13 November 1763 - 15 August 1764, and includes observations of stars and planets and errors and adjustments to instruments and clocks. It mentions the arrival of John Harrison and his chronometers on board HMS 'Tartar' on 13 May 1764 [RGO 4/323: 15v], and includes ratings for these chronometers [RGO 4/323: 15v-16v]. The log also includes details of how and when the astronomer conveyed copies of his observations to Sir Philip Stephens, using different ships...
Dates: 1763 - 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).
 File

Log book of voyage to Barbados, 1761 - 1764

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).
 Item

Memorandum book, '1763 Observations at sea', 1763-09-20 - 1763-10-19

Reference Code: GBR/0180/RGO 218/2/1
Scope and Contents 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].
Dates: 1763-09-20 - 1763-10-19
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

Notes on the discovery of Mr Harrison's time-keeper, 1765

Reference Code: GBR/0180/RGO 4/152: 4-7
Scope and Contents Prose notes describing the workings of the time-keeper, with comments on making adjustments to it and on its accuracy.
Dates: 1765
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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