General correspondence on the Standards Commission. The correspondents include M. Biot, E.W. Brayley, A. de Morgan, W. De La Rue, M. Faraday, J.P. Gassiot, T. Maclear, E. Sabine, C.A. Peters and G.G. Stokes. The volume includes a galley proof titled 'Proposals to increase the gross weight of the Sovereign to 125 grains by making a small addition to the alloy, but preserving 113 grains of fine gold contained therein'; a copy of 'A Bill for regulating Weights and Measures'; a paper titled 'Correspondence on the subject of Mr Ziervogel's Weight and Measures Bill. By Thomas Maclear'; and diagrams of a 'proposed carrier of scales to be compared with standard scale'.