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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 for the neat name and symbol he has given to the new planet; thinks H. C. Schumacher has read Hora for Flora. The next one will have to be called Thetis as so many have suggested that name.
Sends his first approximation of the elements of the asteroid Flora.
Sending notices of several variable stars he has observed recently. Observed Encke's comet twice. Newly discovered variable stars will be discussed in his forthcoming notes to the Ecliptic charts. Sends a small pamphlet on the expected comet.
Sends a copy of the Astronomical Remembrancer to which he referred. The garnet star is BAC 7582. Encloses a list of variable stars and comments on the proximity of two of them.
As JH is compiling a complete catalogue of variable stars, wonders if he has noticed the one listed in the Berlin maps. Has recently made a cometary summary.
May use his cometary summary by all means; believes that J. G. Galle's is the most complete but his method requires improvement. Thinks he has traced the history of Halley's Comet and will be writing a paper on the subject.
Rejoices that RH is studying orbit of Mu2 Bootis. Suggests way to simplify calculations. Compares orbits for Gamma Virginis calculated by various observers. Notice of systematic errors.
Gratitude for Cape Results. Special comments on JH's 'method of sequences' and cometary theory. Refers to article on Halley's Comet in Astronomische Nachrichten. Reports observations of Saturn's satellites and orbit of Gamma Virginis.