Miscellaneous scientific works and routine instructions, including a paper by C.S. Benson on geometry as a science; a piece on the transit of Venus in 'Bell's Weekly Messenger'; writing in an exercise book by J. Gillespie on the motion of the Earth; laws of rotation; minutes of the Paris conference on standards for electrical units, 1884; 'the new electrical era in science' by G.W. Royston-Pigott from 'The Eastbourne Standard'; various earthquakes; M.A. Cornu's optical achromation and chemical achromation; correspondence on the construction and examination of Navy telescopes; correspondence on stereoscopes; and preparations for photographic exhibitions in Glasgow and Oldham. The correspondents include F.V. Hayden, E. Mascart, E. Hull, L. Darwin, J.T. Chance, G. Forbes, S.P. Langley, W. De La Rue, D. Stevenson, C.V. Walker, C.A. Young, W. Huggins and H. Grubb.