Earnshaw, Thomas, 1749 - 1829 (maker of watches and chronometers)
Found in 4 Collections and/or Records:
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.
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.
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.
- Subject: Rio de Janeiro X