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Correspondence on time balls and signals, 1866 - 1870

Reference Code: GBR/0180/RGO 6/616

Scope and Contents

Correspondence and related papers on the time signal and time ball service, including a proposed time ball on Tuskar Rock in the Irish Sea, with a chart; a proposed time signal at Dundee; cable laying on the Great Eastern Railway; a proposed Ipswich Time Ball; the rating and errors of the Westminster and Post Office clocks; a proposed public clock for the City of London; electric clocks for the Adelaide Parliament, Madras (including a drawing) and Colaba Observatory in Bombay (including three photographs, specifications and trials); plans of electric clock systems; the Lombard Street Clocks; and a paper titled 'Time signals at the Start Point', concerning a naval time service. The correspondents include C.F. Varley, W.S. Jacob, C.V. Walker, M.F. Maury, W. De La Rue, J. Washington, E. Sabine, G.H. Richards, G.W. Hunt, T.H. Farrer, W.G. Romaine, T.M. Gibson and P.H. Colomb.


  • Creation: 1866 - 1870


Conditions Governing Access

From the Management Group:

Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (


2 archive box(es) (2 boxes)

Language of Materials