The Sir John Herschel Collection
The preparation of the print Calendar of the Correspondence of Sir John Herschel (Michael J. Crowe ed., David R. Dyck and James J. Kevin assoc. eds, Cambridge, England: Cambridge Univ. Press, 1998, viii + 828 pp) which was funded by the National Science Foundation, took ten years. It was accomplished by a team of seventeen professors, visiting scholars, graduate students, advanced undergraduates, and staff working at the University of Notre Dame.
The first online version of Calendar was created in 2009 by Dr Marvin Bolt and Steven Lucy, working at the Webster Institute of the Adler Planetarium, and it is that data that has now been reformatted for incorporation into Ɛpsilon.
Further information about Herschel, his correspondence, and the editorial method is available online here: http://historydb.adlerplanetarium.org/herschel/?p=intro
No texts of Herschel’s letters are currently available through Ɛpsilon.
Thanks JH and Charles Babbage for their paper on the magnetic experiments. Asks to have 20 extra copies of the paper on the rocket experiments made when it is printed. Speaks of travel expenses. Mentions [T. F.] Colby's opinions regarding the Spitzbergen measurements.
Encloses an outline of JH's paper on iron [? 'On the Separation of Iron from Other Metals,' RSPT (1821), 293-9].
Thanks HO for JH's election to the Royal Academy of Copenhagen. Comments on some chemical and magnetical experiments.
Errors in equinoctial time calculated by John Pond. Suggests limiting decimal places in value of equinoctial time to reflect this uncertainty. Making error uniform will make it awkward to alter future almanacs.
Resolved puzzle about sidereal year, which needs better definition. Error between true and nominal positions prevents TY adopting 'equinoctial time' for chronology investigations.
Comments on several experiments with spectra passing through glass films.