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Dent, Edward John, 1790 - 1853 (chronometer maker)


Found in 31 Collections and/or Records:

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Papers on clock and chronometer improvements, 1851 - 1853

Reference Code: GBR/0180/RGO 6/590
Scope and Contents Correspondence and papers concerning plans for improvements to clocks and chronometers, including improved escapements by E.B. Fennessey; an improved pendulum; E.T. Loseby's improvements in time-keepers; daily rates and tests of Loseby's clock; a report on Loseby's chronometers in the 'Journal of the Society of Arts'; R. Robert's Alpha Clock; A. Bain's short history of electric clocks; and C. Shepherd's application of electromagnetism for motors for clocks. The correspondents include M.F....
Dates: 1851 - 1853

Papers on clock developments, 1844 - 1848

Reference Code: GBR/0180/RGO 6/586
Scope and Contents

Correspondence with clockmakers and other papers concerning new clocks and improvements. There are papers on the Royal Exchange and Hamburg clocks; the rating of the Royal Exchange Clock for 1848; ratings of various chronometers; elasticity of balance springs; improved and new escapements; E.J. Dent's magneto-electric dial; and improved pendulums by J.G. Ulrich and E.T. Loseby. The correspondents include H.C. Schumacher, Lord Wrottesley, F. Beaufort and R. Sheepshanks.

Dates: 1844 - 1848

Papers on Royal Astronomical Society, 1835 - 1848

Reference Code: GBR/0180/RGO 6/230
Scope and Contents Miscellaneous papers relating to the Royal Astronomical Society, including notices of meetings; agenda for the Council meetings; balloting lists for officers; correspondence regarding the lecture on O. Struve's 'Etudes' and the Pulkova Observatory; the results derived from Cambridge observations of occultations, 1830-1835; correction to lunar elements from Greenwich observations, 1750-1830; a lecture upon Lord Rosse's and W. Lassell's telescopes; U.J.J. Le Verrier's paper on periodical...
Dates: 1835 - 1848

Papers on the longitude of Valentia, 1836

Reference Code: GBR/0180/RGO 6/182
Scope and Contents Material regarding preparations for the project to ascertain the longitude of Valentia (Valencia), Ireland, by means of an arc of parallel. The papers begin with correspondence with the Admiralty and Ordnance Survey, including S. Herbert, T.F. Colby, Captain Larcom and C.M. Pasley, and letters concerning arrangements for the transportation of chronometers. The correspondents on the project include Sir J. Barrow, Sir F. Beaufort, W. Cubitt, E. Dunkin, W.H. Smyth and S.H. Christie. The papers...
Dates: 1836
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London 8
Clocks 7
Greenwich 6
Chingford 2
Longitude 2