A miscellaneous set of works on engineering and inventions, including papers on the Woodbridge Railway and its passage through Playford, Suffolk (Airy performed some levelling of the railway near Playford and gave a speech on the decimal scale); S.H. Blackwell on steam governors; the notices, proceedings and awards of the Institution of Civil Engineers; arguments with W. Coude on the origin of Chesil Beach, Dorset; the Smith Testimonial Fund; scaffolding for the Crystal Palace; G.B. Fennessey's 'centrifugal gas'; C. Gill's 'omnipotent artillery'; and a Swedish calculating machine. There are also patents for W. Siemens' balance meter, N.A. Smyth's patent steam-hammers and a floating breakwater.