Earnshaw, Thomas, 1749 - 1829 (maker of watches and chronometers)
Found in 8 Collections and/or Records:
A journal of the situation of HMS Providence at noon during her late voyage on discoveries, 1795-10-11 - 1797-05-16
As shown by the log, by Mr Earnshaw's three timekeepers, by Mr Arnold's two timekeepers, and also by lunar observations. The journal includes a summary of the latitudes and longitudes of 'most of the remarkable places seen in the voyage' [RGO 14/68: 145v].
The account relates to the voyage of HMS Investigator under Captain Flinders and observations taken by Inman at Port Jackson. It includes details of problems Inman had with his equipment.
With the time kept by the timekeeper No. 543 and with additional remarks on the visibility, sea conditions, and occasionally, the location in which observations were made.
Book of rough calculations of astronomical observations and accounts of the daily rates of the timekeepers and their errors. Includes observations written on the back of a sales receipt [RGO 14/66/3: 97v] and on the back of a letter from Robert Brine to Lieutenant Flinders [RGO 14/66/3: 107].
Also included is a list of French phases compiled by Captain Flinders while imprisoned on the island of Mauritius [RGO 14/66/3: 56].
Containing tables of comparison relating to timekeepers A82, A176, A1736, E520 and E543.
The observations form a continuous run, with occasional headings based on location (reproduced here).
Includes accounts of the rates and errors of the timekeepers by Earnshaw and Arnold, and summaries of observations to determine longitude made in Princess Royal Harbour, at Bay 10, in Port Phillip Bay and at Cattle Point on the east side of Sydney Cove, Port Jackson.