Witchell, George, 1728 - 1785 (mathematician)
Found in 2 Collections and/or Records:
Papers regarding payments for work done on behalf of the Board, including some miscellaneous receipts.
'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.