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Papers on the galvanic longitude of Paris, 1854

Reference Code: GBR/0180/RGO 6/635

Scope and Contents

Correspondence and papers regarding the determination of the longitude of Paris by observing set stars and taking the difference between the local time and Greenwich Time received by telegraphic signal. The papers include a piece, in French, on the difference in the longitudes of the Paris and Greenwich Observatories, found in 'Compte Rendu des séances de l'Academie des Sciences'; an article for the daily papers on the experiment to determine Paris' longitude; a piece on the project, in French, found in 'L'Institut'; notes on the arrangement for the tests; comparisons of observations and clock times of signals taken by various observers at Paris and Greenwich; computations of the time occupied in the passage of a signal; papers on the preparation of star places; material on the formation of Greenwich sidereal time, with the difference between the Greenwich and Paris sidereal times; abstracts of sidereal times of signals, with comparisons between Paris and Greenwich; and the difference in longitude between Paris and Greenwich. The correspondents include E. Dunkin, J.C. Clark, P.A.E. Laugier, J.B. Pentland, J.W. Brett, U.J.J. Le Verrier, Y. Villarceau and C.V. Walker.


  • Creation: 1854


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 (


1 archive box(es) (1 box)

Language of Materials



Former / Other Reference


Finding aid date

2006-01-06 11:52:56+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

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