Correspondence with various scientific societies, with related papers. There are notices and council minutes for the British Association; reports of the Kew Committee; the report of the committee wishing to publish K.L.C. Rümker's stellar observations; papers relating to W.R. Birt's lunar committee; W. Thomson's report on tidal observations; W.R. Grove's address to the 1866 convention; and J.D. Forbes' address to the 1867 convention. Other articles include a description of the Kew Observatory in 'The Engineer'; the programmes of the Royal Institution, Batavian Society and Danish Society; the foundation of the Aeronautical Society of Great Britain; the proceedings of the Institution of Hydronomical and Nautical Engineers; a report of the Greenwich School of Science from 'The Kentish Mercury'; the prospectus of the South London Working Men's College; a meeting of the Archaeological Institute; a report on the Alnwick Scientific and Mechanical Institution; R. Main's address to the Ashmolean Society; and notices of the Manchester Literary and Philosophical Society and the Tyneside Naturalists Field Club. The correspondents include G. Rümker, Lord Wrottesley, J.F.W. Herschel, W. De La Rue, J. Glaisher, J.T. Chance, C.V. Walker, J.S. Russell, G.G. Stokes, J. Baxendell, J.D. Everett, O. Struve, E.J.A. Gautier and J. Tyndall.