Miscellaneous astronomical methods, primarily to find longitude from hypotheses, sent in by various lesser known scientists and navigators. There is also material on Sir J. South's experiments with longitude, a long letter by Airy on the altitudes of the Moon, lunar tables, computations of the Moon's apparent motion and a letter by Sir F. Beaufort.

Miscellaneous astronomical methods, primarily to find longitude from hypotheses, sent in by various lesser scientists and navigators. The volume includes J. Gordon's nautical tables, correspondence with Sir F. Beaufort, E. and J. Riddle's 'longitude by double altitudes', J.S. Houston on quadrants and H. Breen's 'method for lunars'.

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.

Correspondence and papers concerning valuations, exchanges and sales of chronometers by the Admiralty and the Royal Observatory. There are tables of the ratings of individual chronometers. The correspondents include F. Beaufort and J. Barrow.

Sent to Francis Beaufort; originally enclosed with the letter at [RGO 5/231: 203].

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Copies of outgoing correspondence from Astronomer Royal, John Pond, and his assistant, Thomas Taylor, at the Royal Observatory. Some of the letters are addressed to chronometer makers. Note that correspondence to more than one person often appears on the same page.

Correspondence on errors and rates of chronometers, including the foundation of time balls at Demerara and C.P. Smyth's account of the Time Ball at the Royal Observatory, Edinburgh. There are also enquiries on various chronometers, including those used on the 'Bounty'. The correspondents include F. Beaufort, C.P. Smyth and E. Sabine.

Correspondence with C. Brooke, F. Beaufort, E. Sabine and F. Ronalds concerning magnetic instruments and photographic registration. There are two circulars advertising Gray and Keen's floating compasses; specimens of photographic secondaries and tertiaries; papers regarding tests on various emulsions; and notes on the Greenwich magnetic instruments for 1853 and 1854.

Correspondence on planetary reductions, including official correspondence with the Government on grants for the reductions and accounts of money paid to computers. There are also reductions of Irish tide observations and accounts and receipts of wages paid out. The correspondents include J. Phillips, J.F.W. Herschel, Viscount Althorp, S.P. Rigaud, T. Spring-Rice, J. Barrow, J.W. Lubbock, F. Beaufort, J. Glaisher and E. Sabine.

Correspondence on the printing and distribution of planetary and lunar reductions. The correspondents include F.W. Bessel, F. Beaufort, H.C. Schumacher, J.F. Encke, W.S. Stratford and J.F.W. Herschel.