Scope and Contents Correspondence with various telegraph companies concerned mainly with the failure of time signals, the refurbishment and repairs of wires, the connections with the Royal Observatory, and the trials of overhead wires. There are papers regarding tests on the Dartford Earth current wires; the damage and restoration of telegraph wires due to snowstorms; Airy's details of telegraphic equipment and methods employed at the Royal Observatory, found in 'Description of the galvanic connexions'; a...

Scope and Contents Papers concerned principally with telegraphs and tests on Admiralty telescopes. The material on telegraphs includes tests and observations of deflections by C.F. Varley; a map of telegraph lines; a report on the South Australian telegraph; and a newspaper article on the Atlantic cable. The papers concerning Admiralty tests on telescopes include Airy's reports on his findings and correspondence with R.S. Dundas. Other material includes A. Sedgwick writing on Darwin's Theory in 'The Cambridge...