Papers relating to the Royal Astronomical Society, including a lecture by Airy on the determination of longitudes by galvanic signals; a paper by Airy on the reduction of the observations of the Revd T. Catton; an address by Airy on delivering the medal to Herr Rümker; a paper by Airy on the difference of longitude between the observatories of Brussels and Greenwich as determined by galvanic signals; correspondence on pendulum experiments; a manuscript by J. Bloxam on clock escapements; letters on the lst comet, 7 March 1853; a letter from Y. Villarceau on Zeta Cancri; letters on the 2nd comet of 1853, with an extract from a letter of Lord Rosse; Herr Rümker's paper on the lunar method of longitudes; reports by Airy on papers by Mr Sawitsch, J. Bloxam, D. Lardner and Professor P.A. Hansen; correspondence concerning J. Hartnup's photographic pictures of the Moon; correspondence concerning the removal of the Royal Astronomical Society to Burlington House; and general correspondence from R. Sheepshanks, A. de Morgan, C.P. Smyth, Col. E. Sabine and others regarding the Royal Astronomical Society.