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Report on astronomical observations, made in the months of July and August 1822, with a view to ascertain the longitude of the island of Madeira. By J. L. Tiarks

[Tiarks - Report astron - Report chrono]: [Recueil factice]

Report on chronometrical observations, made in the months of July, August, and September, 1823, with a view to ascertain the differences of longitude between Dover and Falmouth, and Portsmouth and Falmouth. By J. L. Tiarks