Correspondence and printed papers on astrology, electricity, galvanism, geology and optics. The correspondents include J.C. Clark, W.H. Preece, C.F. Varley, C.V. Walker, M. Faraday, J. Tyndall, U.J.J. Le Verrier, A. Sedgwick, W.H. Miller, J.D. Forbes, W. De La Rue, H. Lloyd, E. Dollond and L.A. Reeve. The papers include pages extracted from the 'American Journal of Science and Arts' on (static) electricity; a copy of 'Our Magazine', including an article on electricity deflections; two maps of Europe showing the railways in connection with the South Eastern Railway; a paper titled 'Central Relations of the Sun and Earth', relating earthquakes and volcanic eruptions to the perihelion; a paper on the properties of ice near its melting point; papers on the stereoscope; a pamphlet on Bridge's Diffraction Apparatus; and a German paper titled 'Das älteste Gregoryanische Spiegelteleskop' (The oldest Gregorian Reflector).