Correspondence and papers concerning galvanism and electric clocks. The correspondents include C.V. Walker, A. Clarke, J. Muirhead, F.I. Scudamore, C. Wheatstone, C.E. Delaunay and S.P. Langley. The papers include a diagram of the gate of the electric clock at London Bridge, 6 December 1872; an extract from 'The Glasgow Daily Herald', 27 January 1866, on electric clocks and electrometers; an extract from 'The Royal Leamington Spa Courier', 17 March 1866, on C.T. Bright's electric clock; diagrams of Bright's electric clock's pendulum; a circular and card on Harrison's synchronous clocks; and a printed 'Table of the Distribution of Time Signals', circulated by the South Eastern Railway.