Scope and Contents From the File:

Papers regarding payments for work done on behalf of the Board.

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 Miscellaneous printed and manuscript catalogues and tables, including 'Value of Jones' micrometer on Jones' circle'; 'Catalogue of 45 Principal Stars'; tables of refractions by Bradley and Dr Brinkley; further tables of refractions; tables of the computations of the north polar distances of stars; 'Catalogue of the Right Ascensions of Thirty-Six Principal Fixed Stars. January 1, 1815'; 'Catalogue of the North Polar Distances of Forty-Two Principal Stars. Reduced to January 1, 1815'; and...

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 From the File:

Vouchers of John Pond and Dr Thomas Young for payments to tradesmen and others.

Scope and Contents From the File:

Vouchers of John Pond and Dr Thomas Young for payments to tradesmen and others.

Scope and Contents From the File:

Vouchers of John Pond and Dr Thomas Young for payments to tradesmen and others.

Scope and Contents From the File:

Vouchers of Dr Thomas Young for payments to tradesmen and others. Also includes occasional correspondence.

Scope and Contents From the File:

Vouchers of Dr Thomas Young for payments to tradesmen and others. Also includes occasional correspondence.

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

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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.

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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.

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Concerning the payment of a further £200 to Mr Jones for the construction of the mural circle for the Cape Observatory and a payment of £150 to Tiarks for his services in ascertaining the longitude of Falmouth.

Scope and Contents From the File:

Observations and correspondence regarding miscellaneous astronomical matters.

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Concerning his progress on the six-foot mural circle for the Cape Observatory and requesting £200 for his work.

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Concerning the price of a six-foot mural circle (seven hundred and fifty guineas) and the time required to make it (about two years).

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Concerning his progress on the six-foot mural circle for the Cape Observatory (which was half made) and requesting £200 for his work.

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Informing him that the six-foot mural circle for the Cape Observatory was complete and requesting payment.

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Enquiring whether the changes he had made to the Greenwich mural circle should also be made to that for the Cape Observatory, and also enquiring about making spare pieces or parts.

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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.

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

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

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

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

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