Miscellaneous correspondence and papers regarding engineering and new inventions. The correspondents include W.H. Smith, C. Manby, W. Farr, E. Dunkin, A. de Morgan and C.V. Walker. Many of the papers are printed, and they include notices of meetings, pamphlets and circulars. The subjects include ship telegraphs, anchors, saccharometers, water meters, gas burners, water filters, hay-making machines, the presidential address of the Institute of Civil Engineers, and the Report of the Harbours of Refuge Commissioners. There are several pages of calculations, some by Airy, and also manuscript papers by him on 'the theory of waves of water', 'the form of a loaded beam', 'the direction of the joints in the faces of oblique arches', and 'the problem of the girder bridge with strain applied at the end of the girder to relieve the central breaking strain, as it is done at the Britannia Bridge'.