Correspondence on the ownership of, purchase of, loss of, conversion of, and trials of chronometers. There is correspondence with the Admiralty and with many chronometer makers. The volume also includes printed copies of 'Instructions for packing chronometers sent from abroad, or from the outports to the Royal Observatory at Greenwich'; a copy of the rules of the Clockmakers Company governing the issuing of the prizes; two pages extracted from 'Nature', 29 March 1877, concerning 'Ships' Chronometers' and 'Lowest Temperature'; a diagram of an experimental pendulum; two plans, one of the Governor and one of the chronometer case at Liverpool Observatory; a printed circular concerning chronometer trials at Hamburg; a certificate advertising the issue of shares by the Synchronome Clock and Electromagnetic Motor Company Ltd; and five diagrams of different types of dials: the 'Victoria' dial, the 'Victoria' dial, with gauge and eleven vernier marks, the 'Albert Edward' dial, the 'Beaconsfield' dial, and the 'Christie' dial (the word Christie is written in pencil).