Witchell, George, 1728 - 1785 (mathematician)
Person
Found in 2 Collections and/or Records:
Item
Account with Messrs George Witchell and John Bradley, 1772
Item
Reference Code: GBR/0180/RGO 14/18: 448-449
Scope and Contents
From the File:
Papers regarding payments for work done on behalf of the Board, including some miscellaneous receipts.
Dates:
1772
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
Errors in lunar distances, 1765 - 1766
File
Reference Code: GBR/0180/RGO 4/292
Scope and Contents
'To clear the distance of the Moon from a star from the effects of refraction and parallax', February 1766. The envelope includes copies of reports made to the Board of Longitude by John Howe, undated, and M. Raper of Thorley Hall, 9 July 1765, on the method of Israel Lyons and George Witchell for correcting observed distances. There are also a number of tables on the Sun's parallax.
Dates:
1765 - 1766
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).
Additional filters:
- Subject
- Astronomy 1
- Marine navigation 1