Scope and Contents Correspondence and papers regarding the determination of longitudes by means of telegraph. There are papers on the difference in longitude between Paris and Greenwich, with observations and transits for clock errors; U.J.J. Le Verrier's determination of the longitude of Le Havre; A. Loussedat's determination of the difference in longitude between Toulouse and Montpellier; the longitude of Glasgow; and the difference in longitude between Altona and Schwerin. There are also papers relating to...