Time measuring instruments
Found in 102 Collections and/or Records:
Lists of chronometers deposited at the Observatory for trials, with the daily ratings of each piece, covering the periods 1822-1825 and 1832-1835.
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.