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Greenwich

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Subject Source: Local sources

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Quadrant and zenith sector observations, 1765 - 1786

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Reference Code: GBR/0180/RGO 4/28
Scope and Contents A rough copy of quadrant and zenith sector observations of major stars. The volume begins with a list of Maskelyne's assistants and a note on days on which each star was observed with the quadrant, 1765-1776. The book deals at length with quadrant observations from 7 May 1765 to 30 December 1785, mentioning tests on John Bird's thermometer and adjustments and alterations to observational technique. There are zenith sector observations for the years 1768-1769 and 1776-1777; observed distances...
Dates: 1765 - 1786
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).