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Earnshaw, Thomas, 1749 - 1829 (maker of watches and chronometers)

 Person

Found in 4 Collections and/or Records:

 Item

Astronomical observations made at Rio de Janeiro, 1791-11-10 - 1791-11-22

Reference Code: GBR/0180/RGO 14/62: 65r-71v
Scope and Contents Tabulated logs of observations, with related remarks. These include observations of equal altitudes; transits of the sun, moon and stars over the meridian; observations on the dip of the magnetic needle; comparisons of Mr Arnold’s watches Nos. 14 and 176 with the clock; comparisons of Mr Earnshaw's watch with the clock; and observations on the tides.
Dates: 1791-11-10 - 1791-11-22
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Computations from observations made at Rio de Janeiro, 1791-11

Reference Code: GBR/0180/RGO 14/62: 158r-222v
Scope and Contents Includes computations of the rates of watches by Arnold and Earnshaw [RGO 14/62: 158r-180r], computations of the latitude and longitude of Rio de Janeiro [RGO 14/62: 181r-196v], tables of the rates of the daily rates of the timekeepers and pocket watches [RGO 14/62: 197], and various mathematical calculations and charts.
Folios 214r-222v are inverted in the volume.
Dates: 1791-11
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 File

Observations in the voyage of the Daedalus, 1791 - 1792

Reference Code: GBR/0180/RGO 14/63
Scope and Contents Astronomical observations, rough calculations and notes; many pages are inverted. The volume also includes a number of rough sketches [RGO 14/63: 232v; RGO 14/63: 244v; and RGO 14/63: 377r]; a draft letter [to Lieutenant Hergest] written in English but partly using Greek script concerning a dispute about going on shore near Kealakekua Bay, Hawaii, and Hergest’s accusations that Gooch ‘stole out of the ship’ without speaking to him first [RGO 14/63: 311r-312r]; translations of Polynesian...
Dates: 1791 - 1792
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).
 Item

Sketches of islands 'discovered', rough calculations and tables, 1791 - 1792

Reference Code: GBR/0180/RGO 14/62: 71*r-150v
Scope and Contents Set of rough astronomical calculations, with tables, notes, and sketches of islands ‘discovered’; the islands are unnamed, although reference points are sometimes given, such as ‘Island A’ [RGO 14/62: 141*v], or ‘Bay at C’ [RGO 14/62: 79v]. Interspersed among the notes are occasional doodles by Gooch [RGO 14/62: 88v], [RGO 14/62: 124r], and translations of [Polynesian] words [RGO 14/62: 124r], [RGO 14/62: 126-127], [RGO 14/62: 141*v].
Some pages are inverted in the volume.
Dates: 1791 - 1792
Conditions Governing Access: From the Management Group: Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).

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