Time measuring instruments
Found in 102 Collections and/or Records:
'Notes on the Ownership of John Harrison's Timekeepers', a 9-page typescript by R.T. Gould, dated at the end 10 May 1937.
Observations on the workings of John Harrison's time-keeper, in two parts.
Observations made by John Crosley on his voyage to New Holland (Australia) on board HMS Investigator to carry out surveying.
Soundings machines and ship's logs, etc.
Papers regarding payments for work done on behalf of the Board.
Papers regarding the loan and return of instruments belonging to the Board of Longitude and concerning persons entitled to receive Board publications.
Correspondence and papers regarding TIM, the Post Office Speaking Clock, including a programme for the opening ceremony on 24 July 1936, a letter of thanks to H. Spencer Jones, a summary of the speech by the Postmaster General, and a description of the workings of the clock.
Papers regarding the public trials and improvements of clocks and chronometers, 1779-1826, 1779 - 1826
Papers regarding the public trials and improvements of clocks and chronometers, 1784-1828, 1784 - 1828
Accounts of rates of chronometers on trial at the Royal Observatory, 1822-1836, preceded by chronometer rates for 1811-1816.
The rating of chronometers at Aden, Suez and Alexandria; calculations on the Alexandria-Berlin longitude; and errors of chronometers.
'Account of the going of the two longitude watches on board His Majesty's sloop, the Adventure Captain Furneaux Commander bound towards the South Seas.' Only two pages of the account and the front cover survive. The rating of the watches covers the period 13-29 July 1772.
Lists of chronometers, 1821-1830, and of the mean daily rates of chronometers, 1830-1834, at the Royal Naval College, Portsmouth.
The UK Archival Thesaurus has been integrated with our catalogue, thanks to Kings College London and the AIM25 project for their support with this.