Harrison, John, 1693 - 1776 (horologist)
Found in 12 Collections and/or Records:
Extracts from the Minutes of the Board of Longitude, including the findings on John Harrison's chronometers.
Presentation pack containing four stamps of John Harrison’s Marine Timekeeper No.4 (24p, 28p, 33p and 39p) and a Harrison information sheet.
Also, first day cover with printed images of Harrison and a ship at sea; the four 'Marine Timekeepers’ stamps are affixed and postmarked by the British Philatelic Bureau, Edinburgh.
The draft letter is addressed to 'My Lord' and is a response to John Harrison's applications to the Board of Longitude and to Parliament to get a second £10,000 in reward money for his marine timekeepers. The letter continues with notes on longitude determination and marine timekeepers by other makers.
'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 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.