Time measuring instruments
Found in 3 Collections and/or Records:
Letter book containing outgoing correspondence, 1782 - 1810
Rating of longitude watches on HMS Adventure, 1772
'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.
Trials of Harrison's chronometers, 1766 - 1771
Observations and comparisons during the trials of John Harrison's chronometers (H1, H2, H3 and H4) and Kendall I, with mean solar time, 1766-1767, and the rating of the Royal Observatory transit clock, 1771. The volume is comprised largely of tables of measurements, with some descriptions of how the results were achieved.
The UK Archival Thesaurus has been integrated with our catalogue, thanks to Kings College London and the AIM25 project for their support with this.

