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A copy of the Annual Report of the Cape Astronomer to the Lords Commissioners of the Admiralty for 24 July 1850 - 31 December 1851, signed by Thomas Maclear.

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A copy of the Annual Report of the Cape Astronomer to the Lords Commissioners of the Admiralty for the year 1852, signed by Thomas Maclear.

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A copy of the Annual Report of the Cape Astronomer to the Lords Commissioners of the Admiralty for the year 1853, signed by Thomas Maclear. At the end is a sketch plan for a proposed extension to the Circle Room.

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A copy of the Annual Report of the Cape Astronomer to the Lords Commissioners of the Admiralty for the year 1854 and January-May 1855, signed by Thomas Maclear.

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A printed copy of RGO 15/24, the Annual Report of the Cape Astronomer to the Lords Commissioners of the Admiralty for the year 1854 and January-May 1855, by Thomas Maclear.

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Computations by R. Main in order to find the constant of refraction. The papers include a catalogue of stars from 1836-1854 suitable for determining refractions; corrections; errors in the constants of refraction; and comparisons of T. Maclear's Cape of Good Hope observations with those undertaken at Greenwich. There is one letter from C.P. Smyth.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 11 February 1849 - 29 July 1850, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 5 August - 31 December 1850, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 6 January - 30 June 1851, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 7 July - 22 September 1851, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 6 October 1851 - 5 January 1852, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 12 January - 29 March 1852, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 12 April - 26 July 1852, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 2 August - 27 December 1852, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 3 January - 20 June 1853, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 27 June - 15 August 1853, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/2) for 22 August 1853 - 2 January 1854, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/3) for 23 January - 25 September 1854, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/3) for 2 October 1854 - 1 January 1855, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/3) for 8 January - 2 July 1855, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

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A copy of Thomas Maclear's weekly administration reports (RGO 15/3) for 9 July - 31 December 1855, part of a series of quarterly reports sent by the Cape Astronomer to the Lords Commissioners of the Admiralty.

Scope and Contents Correspondence of F. Fallows and S. Henderson during their respective periods as Cape Astronomer. The letters deal mainly with the initial establishment of the Observatory, its daily running, instructions from the Lords Commissioners on work to be conducted, and information on the provision of instruments. The correspondence includes the following items:A letter from the Lords Commissioners appointing Fallows as Cape Astronomer, 26 October 1820.A letter from T. Young,...

Scope and Contents Correspondence between T. Henderson, G.B. Airy and T. Maclear, comprising a letter from Henderson aboard H.M.S. 'Melville', 25 January 1832; a letter from Henderson concerning tables of corrections for the microscopes on the mural circle, 27 September 1833; a list of observations with the transit circle, 10 April 1832 - 24 May 1833, and the mural circle, 16 May 1832 - 24 May 1833, with a list of corrections to mural circle microscope readings, dated 27 September 1833; a memorandum by...

Scope and Contents Personal correspondence of Thomas Maclear, including a letter notifying him of his election to the Astronomical Society of London, 14 November 1828, and a petition calling for him to be made a Fellow of the Royal Society, read on 17 March 1831 (he was elected on 8 December 1831). There are also receipts for subscriptions and admission fees to the Royal Society; certificates and diplomas electing Maclear as a corresponding member of various organisations; a printed copy of a review of...

Scope and Contents Correspondence on the workings of, packing of, repairs to, ratings of, and transactions involving chronometers. The volume covers chronometer trials, 1840-1865; trials for chronometer ratings for the Indian Stores Department, the Italian government and mail watches; the influence of air pressure on clock rates; J.B. Harbard's description of clock rates; a time piece for measuring a ship's speed; a clock for Ipswich Town Hall; and a programme of horological instruments by M.F. Dent for the...