Theories and other items on the Sun, Moon and planets, including letters from P.A. Hansen and Mr Cagley on lunar acceleration; correspondence with Dr Hincks on ancient eclipses of the Moon; correspondence on the reduction of the Madras planetary observations; the reduction of the Greenwich planetary observations, 1831-1835; the reduction of the Moon's semidiameter from occultations; correspondence on the diameters of the Sun; a letter from Dr Lehmann on the mean distances of the planets from the Sun; letters of observations on the transit of Mercury, 12 November 1861; the elements of the transit of Venus, 1874 and 1882, by J.R. Hind; a printed circular from C. Haase on the existence of unknown planets between the Sun and the Earth; a letter from G.P. Bond on the mass of Neptune calculated by R.A. Stafford; a letter from M. Foucault regarding his experiments on the velocity of light; a chart for the observation of Mars, 1862; a note on papers relating to the opposition of Mars; and correspondence on lunar tables. There are also newspaper cuttings on the dispute between U.J.J. Le Verrier and C.E. Delaunay.