Scope and Contents

Observations of stars when sub-polar made with Edward Troughton and Thomas Jones' mural circles.

Scope and Contents

Complete transit observations for the years 1817 and 1818, including phenomena of the Jovian satellites; Edward Troughton's corrections to the eyepiece of the transit telescope; adjustments and corrections to the transit clock; and an eclipse of the Sun, 4 May 1818.

Scope and Contents Original transit observations, 12 September 1821 - 24 June 1826, with phenomena of the Jovian satellites; adjustments to the transit clock and transit instrument; replacement of broken micrometer wires; eclipses of the Moon, 5 February 1822, 2 August 1822 and 10 July 1824; 'Observed Capt. Hatiers' light apparently about the size of the wire to the west of the meridian mark'; the pivot of the transit instrument repaired by Edward Troughton; meridian marks at Chingford and Blackwall;...

Scope and Contents

Original transit observations, 6 June 1832 - 10 September 1833, with adjustments to, reversal of, and repairs to the transit instrument involving Messrs Troughton and Simms; adjustment of the transit clock; meridian marks at Chingford and Blackwall; and observations of Saturn's rings.

Scope and Contents

Copy of transit observations, January 1812 - December 1816, with adjustments by Edward Troughton to the transit telescope and transit clock; phenomena of the Jovian satellites; a description of the meridian mark; reversal of the axis of the transit telescope; occultations of various stars; a total eclipse of the Moon, 9 June 1816; and a meteor, 25 October 1816. Pages of records for the year 1814 have been removed from the volume.

Scope and Contents

A copy of observations made with Edward Troughton's circle, 28 July 1815 - 27 December 1816.

Scope and Contents

Edward Troughton's mural circle observations of the stars made with six micrometers; notes on the index error of the circle micrometers giving '2.75 parts horizontal angle by level'.

Scope and Contents

Original observations made with Edward Troughton's mural circle and two micrometers, 1 January 1820 - 31 December 1820. There are several references to sidereal time.

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Original observations made with Edward Troughton's mural circle and two micrometers, October 1821. The observations were interrupted by Troughton putting additional braces onto the telescope.

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Observations made with Edward Troughton's mural circle and two micrometers.

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Original observations made with Edward Troughton's mural circle and six micrometers, 8 April 1825 - 31 December 1825.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes, 2 January 1826 - 10 October 1826.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes. There are notes on faulty instruments throughout the volume, with reference to frequent adjustments of the microscopes, broken wires in the eye piece and deviations from correct positions.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes, August 1827 - August 1828, with notes on adjustments to the microscopes and mural telescope.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes, 27 August 1828 - 29 July 1829.

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Original observations made with Edward Troughton's mural circle and six microscopes.

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Original observations made with Edward Troughton's mural circle and six microscopes, 13 November 1830 - 31 August 1831.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes, 2 September 1831 - 17 December 1831.

Scope and Contents

Original observations made with Edward Troughton's mural circle and six microscopes, 13 December 1832 - 21 May 1834, with notes on instrument errors.

Scope and Contents

Original observations of the stars and planets made with Edward Troughton's mural circle and six microscopes, 21 May 1834 - 31 December 1835, with notes on cloudy conditions and the insufficient definition for observations.

Scope and Contents

Edward Troughton's original mural circle observations of the stars made with two micrometers, with thermometer readings. The volume includes north polar distance and transit measurements made over the meridian wire.

Scope and Contents

Reduction of Edward Troughton's mural circle observations of stars.

Scope and Contents

Reduction of observations of principal stars made with Edward Troughton and Thomas Jones' mural circles, recorded in a ledger for part of 1825 and 1826.

Scope and Contents

Reduction of observations of principal stars made with Edward Troughton and Thomas Jones' mural circles.

Scope and Contents

Reduction of observations of principal stars made with Edward Troughton and Thomas Jones' mural circles.