Correspondence and papers on exhibitions, lectures and inquiries. There is material concerning an exhibition of scientific apparatus at South Kensington Museum, with a layout of the Museum; a certificate for loaning instruments; regulations for exhibitors of the Brussels International Exhibition; an inquiry into the Meteorological Committee; a proposed Physical Observatory; the award of the Albert medal to Airy; a proposed science museum; Airy's lecture on 'the interior of the Earth at Cockermouth, Cumbria'; a map of Cumbrian Railways; Airy's evidence to the Tay Bridge Inquiry and H.C. Rolhery's inquiry report; and the case between the Attorney General and the Telephone Company. The correspondents include, among others, O. Struve, C.V. Walker, W.H.M. Christie, J.H. Dallmeyer, B. Stewart, W.B. Carpenter, F.N.M. Moigno, A.R. Clarke, A. d'Abbadie, G.G. Stokes, J. Tyndall and W.H. Preece.