Scope and Contents

Regulations regarding the loan and rating of chronometers. The volume includes a report of a committee of the Board of Longitude on this subject; regulations on accounts; publication of different chronometer ratings; and details of E.J. Dent's patent for improvements in chronometers and other timekeepers, with plans and drawings. The correspondents are J. Barrow, F. Beaufort, C. Wood, R. Sheepshanks, F. Molyneux and C. Frodsham.

Scope and Contents Correspondence between the Admiralty and chronometer makers regarding the latter's claims for rewards for making improvements to chronometers. The claims were made principally by J.S. Eiffe and J.G. Ulrich, although there are also claims from R. Molyneux, M.R. Parkinson and C. Frodsham. The correspondents include F. Beaufort, R .Willis, C. Wheatstone, J. Barrow and many of the more famous chronometer and watch-makers. The volume includes unconfirmed minutes of the Royal Society, 10 June...

Scope and Contents

General correspondence, some official, regarding the Tenerife Astronomical Experiment. The correspondents include R.C. Carrington, G.S. Criswick, C. Frodsham, J.P. Gassiot, Lieut. Col. James and Sir C. Lyell. There are some letters on distribution.

Scope and Contents Correspondence on instruments used in observing the transit of Venus. The correspondents include J.C. Adams, J. Challis, W. De La Rue, G. Forbes, Messrs C. Frodsham and Co., Messrs Dent and Co., J.H. Dallmeyer and C.J. Corbett. The papers include lists of clocks, with some of their rates; a list of telescopes used in the transit of Venus observations; plans of plate holders for photoheliographs; two photographs of the Corbett 6 1/3" Equatorial Telescope; drawings and a diagram from a...

Scope and Contents From the Series: The first part of collection is comprised of papers concerning the internal affairs of the Board of Longitude, including the granting of awards, accounts, minutes, committee papers, petitions and memorials, the loan of instruments, publications and the payment of staff. These are followed by a wide range of papers relating to the Board's work, concerning clocks, chronometers and other instruments; longitude and latitude; magnetic variation; schemes and inventions; tables; pendulum...

Scope and Contents

Sent by A.B. Becher to John Pond.

Scope and Contents Letters from various British and international observatories on filling vacancies, explanation of the mechanism and construction of time balls at Copenhagen and Edinburgh, the establishment of an observatory at Quebec, and the purchase of chronometers for the Lisbon Observatory. The correspondents include Admiral Radstock, B.A. Gould, J. Glaisher, J. Challis, C.P. Smyth, M.J. Johnson, J.F.W. Herschel and C. Frodsham. There are reports on the Brussels Observatory, 1852-1853, by L.A. Quetelet;...

Scope and Contents

The Lords Commissioners of the Admiralty required each depositor to sign a declaration asserting that they were the maker of the chronometer(s) deposited at the Royal Observatory.

Scope and Contents Miscellaneous papers concerning chronometers, including the ownership of chronometers; certificates for chronometer makers; the advantages box chronometers have over pocket chronometers on steam ships; the injury of chronometers; printed rates of the chronometer M.R. Parkinson and C. Frodsham 2110 from 1 November 1838 to 29 February 1840; a copy of the 'Mechanics' Magazine', 23 February 1839; a circular from E.J. Dent issued after the dissolution of the company Arnold and Dent, stating his...

Scope and Contents Correspondence and papers concerning refinements and improvements to chronometers, including B. Russell's new escapements, with drawings; J.V. Weber's plan for equalising tension in the main spring, with plans; trials of J.M. Bloxam's gravity clock escapements; J.E. Merritt's compensating pendulum; E.T. Loseby's improvements in clocks, with plans and a description of the Leicester Exchange Clock; S. May's new chronometer balance; J.R. Hall's patent for improved clocks and watches; a hermetic...

Scope and Contents Correspondence and papers concerning improvements and refinements to chronometers, including escapements by G.W. Linderoth, J. Gray, J.C. Bloxam, and W. Eaton; I. Hermann's escapement, with explanations and plans; C.F. Frodsham's experiments on compensator balances; E. Huntingdon's compensating pendulum; a model face of an astronomical clock; H.B. James on his invention, 'the compensator'; extracts from a report on Danish exhibits at chronometer exhibitions; correction of a clock by magnetic...

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...

Scope and Contents

The Lords Commissioners of the Admiralty required each depositor to sign a declaration asserting that they were the maker of the chronometer(s) deposited at the Royal Observatory.