Scope and Contents From the File: Papers regarding payments for work done on behalf of the Board, including some miscellaneous receipts.

Scope and Contents Various catalogues reduced to the beginnings of several years in right ascension and north polar distance for 1801-1830, comparison of catalogues at different epochs, and computed north polar distances by different refractions; computation of the Sun's diameter in turn reduced to the Earth's mean distance, 1801-1816; an account of William Hardy's transit clock, 1811-1830; and the zenith distance of Alpha Lyrae, 28 January 1825 - 17 May 1830, made with both Edward Troughton and Thomas Jones'...

Scope and Contents Computations of north polar distances taken from observations made with Edward Troughton and Thomas Jones' mural circles, 5 September 1825 - 4 October 1825.

Scope and Contents Includes a claim for loss of instruments and books on board HMS Providence when it sank on 16 May 1797.

Scope and Contents Five letters concerning a zenith instrument for the Cape Observatory and the appointment of Troughton's young relative, James Fayrer, as assistant there.

Scope and Contents From the File: Vouchers of Dr Thomas Young for payments to tradesmen and others. Also includes occasional correspondence.

Scope and Contents Concerning estimates received from Troughton, Dollond and Jones for instruments for the Cape Observatory.

Scope and Contents Investigation of the Troughton and Jones mural circles and index errors of the two circles, using two and six microscopes, 18 January - 4 May 1825; complete reduction of star observations with the Troughton and Jones mural circles, 14 May - 5 September 1825.

Scope and Contents An investigation of the north polar distances of stars by index errors, using Edward Troughton and Thomas Jones' mural circles and two and six microscopes.

Scope and Contents Concerning estimates for a zenith micrometer for the Cape Observatory, parts of which were also being made by Dollond and Donkin.

Scope and Contents Suggesting that a young instrument maker would make an excellent assistant at the Cape Observatory, and proposing his young relative, James Fayrer, for the post.

Scope and Contents Informing him that James Fayrer would accept the position of assistant at the Cape Observatory.

Scope and Contents Concerning a zenith instrument for the Cape Observatory.

Scope and Contents Concerning the frame for a zenith micrometer for the Cape Observatory. The letter was forwarded by Troughton with a note added.

Scope and Contents From the File: Vouchers of John Pond and Dr Thomas Young for payments to tradesmen and others.

Scope and Contents Investigation of the index error of Edward Troughton's mural circle, January 1814 - December 1818.

Scope and Contents Index errors: horizontal points of Edward Troughton and Thomas Jones' mural circles, also giving the altitude of stars, with a separate ledger of the altitude of stars for 1825.

Scope and Contents Index errors: horizontal points of Edward Troughton and Thomas Jones' mural circles, also giving the altitudes of stars, 2 January 1828 - 28 February 1828.

Scope and Contents Index errors: horizontal points of Edward Troughton and Thomas Jones' mural circles, also giving the altitudes of stars, 2 January 1827 - 28 February 1828.

Scope and Contents Investigation of the index errors of Edward Troughton and Thomas Jones' mural circles, March 1828 - March 1829.

Scope and Contents Index errors: horizontal points of Edward Troughton and Thomas Jones' mural circles, 3 April 1831 - 31 December 1835.

Scope and Contents Index errors: adjustments to Edward Troughton and Thomas Jones' mural circles.

Scope and Contents Observations made with Edward Troughton and Thomas Jones' mural circles and two and six microscopes.

Scope and Contents Readings of Edward Troughton and Thomas Jones' mural circles for principal stars (apparently by refraction).

Scope and Contents A ledger on the investigation of north polar distances of principal stars observed with Edward Troughton and Thomas Jones' mural circles.