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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.
Further on the electrochemical decomposition of metallic salts [see AS's 1843-2-28], and its relationship to photography.
About the health of Caroline Herschel, and other news from Hanover.
Further regarding the method to be adopted for the printing of the star catalogue.
Further regarding the constellations.
Encloses a draft of a letter that it is proposed should be sent to Sir Robert Peel.
JH's account of a comet reminds WT of a strange sighting many years ago. Comments further on improvements in photography, both those made and those needed.
Sending the deeds and the schedule. Please send notice of receipt.
Covering letter to one by Edward Cooper regarding appearance and observations on new comet.
Enlarging on the luminous phenomena he has seen in the S.W. and giving some comments from a naval officer who had observed it.
Describes observing of comet that evening.
Accepts his invitation to visit him in order to discuss various matters.
Newspaper noted Caroline Herschel's 93rd birthday. Requests copy of William Herschel's portrait. Gives address of London relative, Charles Stonhouse, who can copy it. Would JH sit for portrait there also? What did JH decide about 'our comet'?
Official acknowlegement of JH's work on photographic reproduction.
Suggests 'amphitype' as name for JH's process whereby same picture can go from negative to positive. Further comments on comet sighting, and on some improvements to Daguerreotype.
Sending a letter he has received from a friend regarding a curious observation of the moon. Has seen the comet and encloses diagrams of its position.
Describes the visit of the Crown Prince and Princess [of Hanover?] on her 93rd birthday (16 March).
Has copied out JH's map showing the constellations as named by JH. Is moving to Richmond for a few weeks. Gives a message from H. C. Schumacher.
Has just received the news that Hartnell's son has passed the exams at Trinity College, Cambridge.
Sending readings from his observations of the comet.
Comments on JH's positive calotype. Suggests comet may be return of (J.-D.) Cassini's comet of 1668. Gives theorem for finding parabolic orbit of comet if two observations are made in the ecliptic.