Maclear, Thomas, Sir, 1794 - 1879 (Knight, astronomer)
Found in 109 Collections and/or Records:
Letter from Thomas Maclear (RO, Cape of Good Hope) to Francis Baily, 25 October 1835
Concerning the publication of Cape observations by Fallows and Maclear; the accuracy of the transit clock; the expansion of the Cape Observatory; observations of Halley's Comet, 1-24 September 1835; C. Piazzi Smyth's suitability as an assistant; and Brisbane’s Cape Catalogue. The people mentioned include G.B. Airy, R. Sheepshanks, Captain Beaufort, W.G. Grey, F. Fallows, Sir John Herschel and C. Piazzi Smyth.
Letter from Thomas Maclear (RO, Cape of Good Hope) to Francis Baily, 8 March 1836
Concerning Baily's 'Life of Flamsteed'; the arrangement of constellations in the southern hemisphere; the measurement of stellar magnitudes; the calculation of right ascension and declination without errors; and observations of Halley's Comet from 24 January 1836 onwards. The people mentioned include Sir John Herschel, T. Henderson and Captain Beaufort.
Letter from W.S. Jacob (Collegiate School, Sheffield) to Thomas Maclear (Cape Observatory), 1843
Concerning his visit to the Cape Observatory (where C.P. Smyth instructed him on photography), his return journey to Weymouth and observations of a comet [the Great Comet of 1843?], the reform of the Oxford Observatory, the introduction of the railway, and the Indian Survey. People mentioned include Captain Smyth, Dr Lee, Lieutenant Waugh and Mrs Smyth.
Letters from observatories, 1849
Letters from observatories, 1861 - 1865
Letters from Simon's Town Naval Yard, 1850 - 1870
Letters from the Admiralty, 1853 - 1870
Letters from the Colonial Office, 1860 - 1872
Letters on the Magnetic Observatory fire, 1851 - 1856
Letters on the Port Elizabeth Time Ball, 1866 - 1869
Letters on the telegraph, 1860 - 1869
Letters to Thomas Maclear concerned mainly with the telegraph and related apparatus, including batteries. Parts of some of the letters are damaged, rendering the text unreadable.
Letters to Francis Baily, 1828 - 1843
Correspondence comprised predominantly of letters from T. Maclear or F. Fallows to F. Baily:
Letters to Thomas Maclear, 1840 - 1863
Letters to Thomas Maclear from W.S. Jacob and C.P. Smyth, mainly of a personal nature. The letters include a set sent by Smyth to Maclear while he was absent from the Cape Observatory performing observations for the Arc of the Meridian and Cape Survey. These include carbon copies of Maclear's instructions for further work to be done. There are also printed publications of the 1849 meeting of the 'Entomological Society of London' and on the 'Akbar Frigate'.
Measurements on the meridian arc, 1840 - 1841
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Measurements on the meridian arc, 1842 - 1843
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Measurements on the meridian arc, 1843 - 1844
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Measurements on the meridian arc, 1844 - 1845
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Measurements on the meridian arc, 1844 - 1846
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Measurements on the meridian arc, 1846 - 1847
Measurements by Thomas Maclear of the angle of triangulation of a chain of points along the arc of a meridian, with an index at the beginning containing the names of the stations at which the observations were made.
Meteorological register, 1851-07-01 - 1851-10-14
The private meteorological register of Thomas Maclear.
Microfilm of RGO 15/27 and 30
An undated microfilm made by the Public Record Office of correspondence of the Royal Observatory, Cape of Good Hope: RGO 15/27, correspondence of Fearon Fallows and Thomas Henderson, 1820-1833, and RGO 15/30, correspondence of Henderson, G.B. Airy and Thomas Maclear, 1832-1842.
Miscellaneous correspondence, 1846 - 1897
Miscellaneous correspondence, 1857 - 1859
Miscellaneous correspondence, 1837 - 1850
Letters to Thomas Maclear from Timms, Gibbs, F. Baily, Taylor, G. Dolland, the Academy of Science in Paris and G.B. Airy regarding Halley's Comet, the printing of observations, instrument problems and their solution and other subjects.
Miscellaneous correspondence, 1841 - 1860
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