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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 JH for drawing of solar maculae from 1854-61. Some hesitancy about the accuracy of [Alexander?] Wilson's observations and hypotheses. Sixty people wish to travel to Spain to see eclipse of the sun.
Is sending solar autographs. Notes that in groups of spots the larger precede the smaller spots. Can JH form any theories from this?
Detached postscript that discusses the margins of the two photographs, which seem to show that all planets are in the near hemisphere.
Desires permission to present JH's 'diagram of "macularity"' to the R.A.S.
Discusses the different strata of the ocean and [William] Carpenter's lecture on deep sea dredging. Is digging an artesian well.
Sends two copies of JH's 'macular conspectus.' Mr. Titterton was very pleased that JH approved of his work.
Thanks JH for the drawings. Will send new solar autographs showing macula. Is working on the autographic series of the activity of the sun during its 11 year period.
Has been trying to make pendulum curves. Believes they may help explain the different sunspot forms. Thanks JH for the spectroscopic observation memoirs.