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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.
Regarding L. F. Menabrea's papers, thinks he is a good mathematician. Is not so sure about Augusta A. King's (Lady L[ovelace]) notes.
Writes to send thanks by way of AH to the King of Prussia for the award of the Order of Merit. JH also comments on some astronomical matters.
R.S.L. business about an observatory at the North Cape in Sweden.
G. B. Airy needs HL to send him the information used to set up colonial magnetic observatories.
About the urgent need to prepare a report on the magnetic observations, and that HL is the most logical person to give direction to it.
Comments on a paper on the calotype by W. H. F. Talbot, adding some experiences of his own on the subject.
Comments on Louis Daguerre's work, and on the question of a North Cape observatory.
Comments on balloon ascent report, photographic paper made with vegetable colors, and the need to provide a polarizing crystal to J. B. Biot.
Comments on WL's finding a sixth star in the trapezium of Orion [see WL's 1842-3-10]; lists other catalogues that identify that star.
Urges some revision in both the report and instructions for the magnetic observations.
Asks HL for comments about the question of continuing the magnetic observations.
Question of procedure about considering the magnetic observations for publication.
Wants to know if GA's opinions [see GA's 1845-4-1] are available for public information, or only for JH.
Is anxious for some means to be developed to get a measurable quantity [preferably by weight] from the action of a beam of light on a surface. JH has been experimenting in photography with 'flouric' compounds.
Is trying to organize a meeting of the Magnetic Committee before the meeting of the B.A.A.S. in Cambridge, to deal with reporting and committee membership.
Further to arrangements about meeting [see JH's 1845-5-30].
Comments on WL's observation of the seventh satellite of Saturn as noted in WL's 1846-8-26.
Believes that the observations WL has made are quite sufficient to establish the existence of the seventh satellite of Saturn.
Announces, to WL, the discovery of a new planet beyond Uranus, gives co-ordinates, and urges WL to look for satellites 'with all possible expedition.'
Ask WL's permission to make reference to WL's sighting of the seventh satellite of Saturn in JH's observations of all the satellites of Saturn.