The weekly register of the general work of the Cape Observatory, including observations, details of instruments used and other information. The volume includes the following items:

Observations of the immersion and emersion of Jupiter's satellites, 1839-1840.

Observations of Mars, Venus and Mercury, 1839-1840.

An account of an eclipse of the Sun, 26 August 1840.

Observation tables of Encke's Comet, 2-21 May 1842.

Reports by C. Piazzi Smyth of sightings and observations of a comet using Dolland's Achromatic and Bar Micrometer, 3 March - 19 April 1843.

Lunar and planet observations, 1 May - 6 December 1843.

Tables of observations for determining the value of the angular micrometer attached to Dolland's 46-inch Achromatic, 8-11 June 1844.

Computations for corrections for refraction, January 1844.

Copies of correspondence between T. Maclear and C. Piazzi Smyth, 1843-1844, regarding an accident to the theodolite and the disagreement between them over the register entry of 26 March 1843.

Observations of an eclipse of the Moon and Jupiter's satellites, May 1844.

Observations of a comet first sighted from Paris on 7 July 1844 by M. Mauvais, October 1844 - March 1845.

Observations of the Great Comet Daily readings, December 1844 - March 1845.

Observations of Gambart's Comet, 1845-1846.