Breen, Hugh, 1824 (astronomer)
Found in 25 Collections and/or Records:
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'.
Computations by H. Breen on observations made at Greenwich, Cambridge, Edinburgh and the Cape, concerning the constant of lunar parallax. Some of the computations relate to the theories of J.K. Burckhardt and J.C. Adams.
Correspondence with the superintendents of computations on the progress and problems of planetary and lunar reductions. There is a report on the state of planetary computations, and a report on the state of lunar computations and the amount of work performed by individual computers. The superintendents are J.W. Thomas, R. Main and H. Breen. There are letters by J. Glaisher and G. Fisher.
Correspondence regarding H. Breen's reductions of the observations made by James Bradley at the Royal Observatory during the years 1743-1750. The volume includes H. Breen's wage receipts; reports on the state of the calculations; and 'Work Book (2)' of G W. Farrcourt, assistant to H. Breen. There is also related correspondence with the Admiralty, J.C. Adams and R. Main.
Letters sent to H. Breen and other computers giving instructions on planetary and lunar reductions, as well as requests for stationery and leave. Some of the correspondence has been removed. There is a Penny Black postage stamp on fo. 9r.
Daily work records of computers and of E. Dunkin, H. Breen, H. Breen Jnr, R. Dunkin and T. Downs for work carried out on lunar reductions. The records include hours of attendance, the tasks performed, the quality of the computations and brief summaries of each year's work.
Computations by H. Breen of the Greenwich planetary reductions for 1831-1835. The volume includes three copies of 'Appendix II Reductions of the Greenwich Planetary Observations'.
Lunar computations and tables, probably calculated by H. Breen. The volume includes works on parallactic inequality; tables for correcting and converting longitude and ecliptic north polar distance to right ascension and north polar distance; investigations, methods and computations in reducing observations of both limbs of the Moon; and solutions to lunar equations. The reductions relate to observations taken between 1751 and 1787. The volume is undated.
Occasional orders to Assistants concerning H. Breen's eyesight, star catalogues, the zenith tube and the declination magnet, etc.
'On the value of the Moon's semidiameter' by Hugh Breen, Appendix I to the Greenwich Observations, 1864. There are no publication details.
Reductions by H. Breen of observations made by James Bradley at the Royal Observatory during 1743-1750. The volume includes corrections of imperfect transits of stars, index errors of the iron quadrant, and computations for temperature.
Reductions by H. Breen of observations made by James Bradley at the Royal Observatory during 1743-1750. The volume includes computations of Bessell's Table VIII, computations of correction to declination, and computations of A and log A.
Reductions by H. Breen of observations made by James Bradley at the Royal Observatory during 1743-1750. The volume includes computations of precessions in right ascension and computations of the correction to the right ascension arc of Bessel's 36 stars.